willow allergy



Overview

It refers to the abnormal immune response of the human body to willow flakes, which is characterized by symptoms such as runny nose, sneezing, itchy nose, nasal congestion, rash, itching, etc. Treatment includes keeping away from willow flakes and anti-allergy treatments, which are more likely to occur in allergic people and people with a family history of allergic diseases.

Definition

Willow floss, also known as willow wool or willow flowers, is the fine, fibrous material produced by the willow tree (a member of the willow family) when it blooms and sets seed in the spring.

The proteins and other chemicals in willow flakes stimulate the immune system, and when the immune system overreacts and sees harmless willow flakes as a threat, allergies can occur, with symptoms such as a runny nose, sneezing, itchy eyes, itchy throat, and itchy skin. Severe willow allergy can trigger asthma or inflammation of the respiratory tract [1-3].

Willow allergy may recur and requires long-term attention for prevention and treatment.

Flare-ups

The season of high incidence of willow allergy is usually spring (February to May, with a peak in April), especially when willows bloom and set seed. During this period, the concentration of willow flakes in the air is high.

Causes of the disease

In areas and seasons with high concentrations of willow wadding, the human body reacts allergically to the willow wadding proteins and develops a range of allergic symptoms.

Causes

The causative agent of willow allergy is mainly the proteins in willow wadding.

When willow trees blossom and set seed in spring, willow flakes are dispersed into the air with the wind. Sensitized people may have an allergic reaction when they inhale or come into contact with willow flakes containing these proteins [4-5]. This can of course be accompanied by physical irritation of the mucous membranes by the willow flakes themselves.

Risk factors

The following factors may be closely associated with the development of willow allergy and are high risk factors for the disease.

Allergy: People with a history of other allergies (e.g. to pollen, dust mites, animal dander, etc.) are more likely to develop an allergic reaction to willow flakes.

Genetic factors: If there is a family history of allergic diseases, such as allergic rhinitis, asthma, urticaria, etc., it will increase the risk of allergy to willow.

Environmental factors: People who live in areas with poor air quality and high concentrations of willow flakes may be more likely to develop willow allergies. People who smoke or are exposed to secondhand smoke for long periods of time are more likely to develop willow allergies.

Age: Willow allergy is more common in children and adolescents, but it can also develop in adults and the elderly.

Immune function: People with an imbalanced or compromised immune system are more likely to develop willow allergy.

Pathogenesis

Willow allergy is mainly due to hypersensitivity of the body’s immune system to the proteins in willow flakes.

The immune system is supposed to protect the body from harmful substances such as viruses and bacteria. However, in people with willow allergy, the immune system mistakes the proteins in willow flakes for harmful substances, resulting in an allergic reaction. This reaction causes the body to release some chemicals (e.g. histamine), triggering allergy symptoms such as sneezing, runny nose, itchy eyes and itchy skin.

Symptoms

The main symptoms of willow allergy include runny nose, sneezing, itchy nose, nasal congestion, rash and itching.

Main Symptoms

Runny nose

Patients may experience a large amount of watery nasal discharge. This is because histamine released by the immune system stimulates the nasal mucosa, leading to increased secretions.

Sneezing

Histamine stimulates the nerve endings in the nasal cavity, leading to a sneezing reflex and the patient will sneeze frequently.

Nasal congestion

Histamine causes congestion and swelling of the nasal mucosa, leading to nasal congestion.

Itchy, red and swollen eyes

Allergic reaction leads to irritation of the mucous membrane of the eyes, triggering symptoms such as itching, redness, swelling and tearing.

Other symptoms

Itchy throat

Proteins in willow flakes irritate the mucous membranes in the throat, leading to itching and discomfort.

Cough

Willow floss allergy may cause irritation of the mucous membranes of the respiratory tract, leading to coughing.

Tinnitus and ear congestion

Swelling of the nasal mucosa may affect the Eustachian tube, leading to ear discomfort and tinnitus.

Headache

Nasal congestion may cause headaches, especially in the forehead and root of the nose.

Itchy skin

Willow flakes in contact with the skin may cause localized itching and redness.

Complications

Allergic rhinitis

Prolonged allergy may lead to allergic rhinitis, with symptoms including nasal congestion, runny nose and sneezing.

Bronchial asthma

Severe willow allergy may trigger asthma attacks, manifesting as wheezing and difficulty in breathing, etc. Early medical attention is required.

Sinusitis

Allergy-induced swelling of the nasal mucosa increases the risk of infection and triggers sinusitis.

The symptoms include headache, facial pain, nasal congestion and yellow-green nasal discharge.

Conjunctivitis

Allergies can lead to conjunctivitis, which is characterized by red, swollen, watery, itchy eyes and increased discharge.

Skin eczema

Willow allergy can lead to itching and redness of the skin, and in severe cases may lead to eczema. The skin appears dry, red, swollen, itchy and oozing.

Sleep disorders

Symptoms of willow allergy may affect the patient’s sleep, leading to difficulty falling asleep, waking up during the night, and daytime fatigue.

Seek medical attention

If symptoms such as a runny nose and sneezing occur, you need to seek medical attention. The doctor will ask about symptoms, medical history, previous tests and treatments.

Department of Medicine

Department of Allergic Reactions

When symptoms such as runny nose, sneezing, nasal congestion, itchy red eyes, etc. occur, visit the Department of Allergy.

Dermatology

Consult the Department of Dermatology if you have symptoms such as redness, swelling and itching of the skin.

Ear, Nose and Throat

If you experience symptoms such as runny nose, sneezing, nasal congestion, itchy nose, etc., it is recommended to consult the ENT department promptly.

Respiratory Medicine

When symptoms such as coughing, chest tightness, breathlessness and wheezing occur, it is recommended to consult the Department of Respiratory Medicine.

Emergency Medicine

If you experience more serious symptoms such as difficulty breathing, chest tightness, or wheezing, you need to call 120 or go to the emergency department immediately.

Preparation for medical treatment

Preparing for your visit: registering, preparing your documents, and frequently asked questions.

Tips for seeking medical treatment

If you have a skin lesion, you can take a picture of your previous rash (lesion) with your cell phone and provide it to your doctor for reference.

If you have a rash on your face, do not wear make-up before visiting the doctor.

Preparation Checklist

Symptom list

Pay particular attention to the time of onset of symptoms, special manifestations, etc.

What are the symptoms of discomfort?

When did the symptoms start? How long do they last?

Are they intermittent or constant?

Are there any obvious triggers for the symptoms?

Medical History Checklist

Is there a history of allergies? What are the allergens?

Are there any family members with allergies?

Any history of other chronic diseases such as asthma, allergic rhinitis, etc.?

What is the surrounding environment?

Checklist

Test results in the last six months, which can be brought to the doctor’s appointment

Skin test, serum allergen sIgE test, pulmonary ventilation function, diastolic test and bronchial provocation test, etc.

Medication List

Medication used in the last 3 months, if available in boxes or packages, bring along with you to the doctor’s office

Oral antihistamines, such as loratadine.

Hormones (oral, nasal spray, inhaled), e.g. prednisone, extended-release theophylline.

Leukotriene modulators, e.g. montelukast.

Beta agonists (oral, inhaled, long-acting, short-acting) and combinations containing the above drugs, etc.

Diagnosis

Diagnosis can generally be made on the basis of history and clinical manifestations, and the diagnosis of willow allergy can be clarified by willow allergen skin prick test.

Diagnosis is based on

Medical history

Epidemiologic factors such as personal history of allergy, family history of allergy, often occurring in spring, and living in areas with high concentrations of willow flakes.

Clinical manifestations

There are respiratory symptoms such as cough, chest tightness, dyspnea and wheezing.

There are nasal symptoms such as nasal congestion, runny nose, itchy nose and sneezing.

There are skin itchiness, wheals, erythema, papules, blisters or mossy lesions.

Laboratory tests

Willow-specific IgE: Specific IgE antibody test can be performed by RAST, ELISA [6-7].

Allergen in vivo test

Skin test

Commonly used methods include intradermal test and skin prick test. Skin prick test is the most commonly used method.

According to the size and redness of the formation of the air mass after puncture to determine whether the allergy to willow floss.

Bronchial or nasal mucous membrane excitation test

The bronchial provocation test is mainly used to determine whether asthma is caused by willow flakes. However, because of the risk of asthma, it is rarely used in clinical practice.

Nasal mucosa excitation test is mainly used to determine whether allergic rhinitis is caused by willow.

Differential diagnosis

The history and clinical manifestations of willow allergy in some patients are atypical, and are often confused with the following diseases, which should be differentiated.

Allergic rhinitis caused by other allergens.

Willow allergy only has symptoms related to allergic rhinitis and the allergen test is positive, it is necessary to identify whether the allergen is willow floss.

Similarity: symptoms related to rhinitis such as runny nose, nasal congestion, etc., and the allergen test is positive.

Differences: Willow-wool specific IgE and in vivo tests such as skin prick test, bronchial or nasal mucosal provocation test are used to identify whether the allergen is willow-wool or not.

Non-allergic rhinitis

Willow allergy with only rhinitis-related symptoms needs to be differentiated from infectious rhinitis.

Similarities: Rhinitis-related symptoms such as runny nose and nasal congestion may occur.

Differences: Infectious rhinitis is often accompanied by other symptoms (fever, headache) and a negative allergen test. Willow allergy, on the other hand, has a history of willow exposure or personal allergy and a positive allergen test.

Treatment

The aim of treatment is to control the symptoms as soon as possible and to avoid progression of the disease.

Treatment principle: active medication to relieve allergic symptoms in the acute phase [8-10].

General treatment

If willow allergy occurs, it is necessary to detach from the allergen. Specifically include:

Checking pollen counts: once willow allergy season begins, pollen counts need to be checked daily. If pollen counts are high, stay indoors as much as possible. You need to consider wearing an N95 mask when outside to avoid inhaling pollen.

Shower, wash hands and face: After going outside, it is a good idea to shower and rinse off promptly or wash your hands and face thoroughly to remove pollen from your skin and hair.

Keep your house clean: Pollen may enter your home at certain times, use a HEPA filtered vacuum and wipe down hard surfaces with a damp rag.

Limit outdoor time to the evening: Pollen usually peaks in the morning and early afternoon, so it’s best to go outside in the evening.

Keep windows closed: Make sure you don’t let pollen in through windows. Keep them closed and use air conditioning during allergy season.

Medication

Antihistamines (oral, nasal spray)

Commonly used drugs: Loratadine, Cetirizine, etc.

Effects of medication: Block H1 receptors and relieve the patient’s allergic symptoms.

Medication precautions: common adverse reactions are fatigue, headache and drowsiness.

Glucocorticoid drugs (oral, nasal spray, inhalation)

Commonly used drugs: mometasone furoate nasal spray, budesonide nasal spray and other topical preparations, if necessary, prednisone tablets and other oral application.

The role of drugs: a strong anti-inflammatory effect, can reduce mucosal swelling, relieve runny nose, nasal congestion, cough and other symptoms.

Medication precautions: you need to focus on the side effects of glucocorticoids, long-term application can be hypokalemia, osteoporosis, infections in other parts of the body and other side effects.

Leukotriene regulator

Commonly used drugs: montelukast sodium.

Effects of the drug: used to block the role of leukotrienes in the inflammatory response.

Medication precautions: this drug is generally well tolerated, uncommon adverse effects include behavioral mood changes, if such symptoms occur, seek medical attention promptly.

Prognosis.

With standardized treatment, willow allergy generally has a good prognosis and symptoms may resolve.

Cure

If regular treatment is received in time, most can be completely controlled without further progression or even irreversible changes (e.g. airway remodeling).

A small number of patients cannot be completely controlled, but symptoms can be significantly relieved.

Willow allergy with severe asthma can be life-threatening if not controlled promptly and effectively.

Hazards

Daily life

Repeated episodes of willow allergy can lead to symptoms such as coughing, wheezing and difficulty in breathing, affecting the patient’s normal life and work.

Mental health

Willow allergy triggers allergic rhinitis, asthma, dermatitis, etc., often recurring episodes, patients are prone to depression, anxiety and other negative emotions.

Daily life

Willow allergy requires attention to daily life management and avoiding contact with willow as much as possible. If allergy is detected, timely consultation and treatment are required.

Daily management

Dietary management

During the onset of allergy, avoid foods that may aggravate allergic symptoms, such as seafood and spicy foods.

Life management

Avoid contact with willow flakes: Try to avoid going out during the willow flakes season. If you need to go out, wear masks and glasses to minimize exposure to willow flakes.

Keep indoor air clean: Clean regularly and use air purifiers, especially those with HEPA filters, to reduce the concentration of willow flakes indoors.

Pay attention to weather information: pay attention to local willow flurry and pollen concentration forecasts and avoid going out during high-risk times.

Window protection: Try to keep windows closed to avoid willow flakes from entering the house during the high willow flakes season.

Avoid drying clothes: Avoid drying clothes outdoors to avoid willow flakes attaching to them.

Disease monitoring

There is a possibility of recurrence of the disease. If symptoms such as dyspnea, wheezing, stuffiness, cough, runny nose, itchy nose, red, swollen, itchy skin, and clammy skin reappear, it is often indicative of a relapse or exacerbation of the disease, and prompt medical attention is needed to avoid delays in the disease.

Prevention

The main principle of prevention of willow allergy is to avoid contact with willow flakes. When the density of willow flakes is reduced to a certain level, it can effectively reduce the onset of allergy symptoms.

Maintain a good routine, eat a balanced diet and build up your body’s resistance.

Minimize going out on windy days and avoid willow flakes as much as possible. If you do go out, wear a mask to cover your nose and mouth. Wash your exposed skin and nasal passages when you get home; change clothes when you go indoors and do not bring allergens home.

It is not recommended to open the windows for a long time during the flocculation season. Air purifiers can be used more often to filter impurities in the air, including fluff.

If lint gets into your eyes, do not rub them with your hands, but rinse them under clean running water or wipe them with a sterilized cotton swab.

If an allergic reaction occurs, take anti-allergy medication when appropriate.