When symptoms such as sneezing, runny nose, cough, asthma, itchy skin, rash and red eyes occur, people usually go to ENT, respiratory or dermatology departments, but often do not enter the allergic reactions department. In fact, many of these symptoms are caused by allergens, and the Department of Allergology specializes in the treatment of allergic diseases. In the allergy department, doctors help patients find allergens and provide specific treatment to reduce symptoms and control the disease. Compared with many clinical disciplines, allergology is a very young discipline. The first allergic reactions department in China was founded by Peking Union Medical College Hospital in 1956. At present, the department of allergic reactions is being established in tertiary hospitals across China. However, most medical schools still do not have a special course on allergic reactions, but only occupy a chapter in clinical immunology. As a result, many doctors are not aware of it, and the awareness of patients is even worse. There are many misconceptions about allergies: some people get pimples on their face when they eat chili peppers, thinking that this is an allergy, but in fact it is acne caused by poor diet. After drinking milk, the stomach is bloated, that is lactose intolerance. Some people claim to be allergic to alcohol, but that’s actually called intolerance. So, what exactly are the symptoms of allergic diseases? 1. Sneezing and breathlessness while cleaning and packing clothes at home may be dust mite allergy. 2, once in spring and autumn, runny nose, watery eyes, itchy eyes and nose, asthma, this may be allergic to spring and autumn pollen. 3. Nasal congestion and asthma when walking into a damp basement or loosening the soil of ornamental flowers at home may be due to fungal allergies. 4.When you have pets at home (cats, dogs, guinea pigs, birds), you often feel itchy eyes, nasal congestion and breath-holding, which may be an allergy to pet dander 5.When you encounter the stimulation of cold air in winter, you cough, runny nose and can’t breathe, which may be due to the nasal mucosa being too sensitive, or you may have the basis of allergic rhinitis. 6.After encountering cold or contacting cold objects, local or generalized edematous parenchymatous wind masses of different sizes and accompanied by huge itching may be cold urticaria. 7.After eating mango, the mouth and lips itch and the face swells, which may be mango allergy. 8.After eating seafood, diarrhea, rash on the forehead and back, this may be seafood allergy 9.After eating a bowl of noodles and then going out for a walk, suddenly a large rash, dizziness, loss of consciousness, incontinence, this may be wheat-dependent exercise-induced anaphylaxis. 10.After playing penicillin or taking traditional Chinese medicine, rash, lower blood pressure and shock appear, which may be drug allergy. 11.After using cosmetics, redness, rash and pain on the face, which may be cosmetic allergy. 12.After hair dyeing, the face, behind the ears or hairline, there are wind clusters, itching, after showering, the whole body skin symptoms, this may be hair dye allergy 13.Children’s skin redness, rash, followed by skin browning, flaking, this is eczema in young children, may be due to allergy to ingestion, inhalation or contact. 14, elbow fossa, N fossa, neck skin dryness, lesions, intense itching, facial skin cracks, dry rash hypertrophy, with obvious moss-like changes, which may be atopic dermatitis. 15, after being bitten by the grass crawler (scientific name tick), shock occurs when eating pork again, which may be due to red meat allergy caused by the presence of cross allergens between grass crawler and pork. Allergic diseases are becoming more and more common in our lives, and the World Health Organization (WHO) has ranked allergic diseases as the fourth most common disease worldwide. However, there is no need to worry too much, as most allergic diseases can be effectively controlled and clinically cured through professional consultation and treatment.