Itchy neck and allergies are considered to be caused by the following: 1. allergic reactions caused by contact with creams; 2. allergic reactions caused by wearing chemical fiber clothing; 3. allergic reactions caused by applying sunscreen; 4. alcohol allergies caused by heavy alcohol consumption; 5. allergic reactions caused by eating beef, mutton, shrimp, crab, scallops, and hairy substances such as mangoes and durian; 6. allergic reactions caused by eating allergic substances such as prawns. Allergic reactions caused by allergy-prone substances. After the appearance of the above allergic reactions, it is necessary to immediately take oral olopatadine hydrochloride tablets, one in the morning and one in the evening, together with epinastine hydrochloride capsules, two capsules every night, and external application of mometasone furoate ointment once a day for treatment.