Itchiness: This is the most important symptom, especially at night, making the quality of sleep greatly affected. Mossy lesions: The skin is thickened and begins to appear dark brown with dryness. Hormonal dermatitis: Mostly caused by the use of hormonal creams, the skin begins to appear atrophy, thinning of the corneal layer and other phenomena. Facial allergic dermatitis is an inflammatory skin reaction caused by many factors, with many common triggers and different names for allergic reactions caused by different causative factors. Cosmetic dermatitis is a facial dermatitis caused by cosmetics, called cosmetic dermatitis. Cosmetics have become an indispensable part of people’s daily life. Some people often use a certain kind of cosmetics, once they stop using or use again will have an allergic reaction; there are also people who have an allergic reaction to the face after the first use; there are also reactions that occur after the use of sunlight exposure. Most dermatitis patients have an allergic reaction within a few hours after using cosmetics, which is medically known as immediate (or rapid) allergic reaction; those who have an allergic reaction only after a few days are called delayed reactions. Generally, the immediate type of reaction is more common. In mild cases, there is only local itching of the skin, a few scattered small red papules, erythema and mild swelling; in severe cases, there is local edema, diffuse erythema, blisters of different sizes, and even oozing vesicles. Allergic dermatitis often makes itching unbearable, and at night the itching intensifies, making it difficult to sleep at night, seriously affecting the quality of sleep, which in turn affects work, study and life; because allergic dermatitis patients often feel itchy, often scratching hands, if scratching for a long time, may cause aggravation of skin inflammation, secondary and infection of other diseases; allergic dermatitis if it occurs in the face and other exposed parts, affecting the aesthetics, patients often feel inferior. The patient often feels inferior, thus causing depression, which seriously affects the patient’s physical and mental health. The causes of atopic dermatitis are: intrinsic causes: the patient himself is allergic, which plays a leading role in the onset of facial atopic dermatitis. In addition, chronic digestive diseases, mental stress, insomnia, excessive fatigue, emotional changes and other mental changes, as well as infectious lesions, metabolic disorders and endocrine dysfunction, can trigger or aggravate the condition of atopic dermatitis. Symptom characteristics 1. When high efficiency corticosteroids are applied topically to the same area for more than 3 weeks, secondary symptoms such as erythema, papules, dry flaking, atrophy, atrophic lines, capillary dilation, purpura, acne, abnormal pigmentation, rosacea-like dermatitis, perioral dermatitis, photosensitivity, hirsutism, ringworm that cannot be easily identified, ichthyosis-like changes, etc. appear on the skin. 2.After the application of hormone drugs, although the original disease can be rapidly improved, once the drug is stopped, within 1-2 days, the skin of the drug site will again occur with significant erythema, papules, chaps, flaking, small pustules, itching and tenderness and other symptoms. When the drug is used again, the above signs and symptoms will quickly subside, such as the discontinuation, dermatitis symptoms and quickly again, and gradually aggravated, the dependence on hormones is more obvious. 3. There is significant localized conscious itching or burning sensation. The actual dermatology of the skin is a big category of dermatology, and the symptoms can be redness, swelling, itching and pain, especially itching.