If the body itches as soon as you run, consider several situations, as follows: 1. Atopic dermatitis: When running, due to the peripheral blood circulation, breathing, heartbeat accelerates, when inhaling dust, dust mites, pollen in the air, causing the patient to cough, wheeze, chest tightness, shortness of breath, resulting in allergic asthma, and then the patient’s body will appear dense papules, with obvious itching, and even polymorphic damage. After scratching, this can lead to thickening of the skin. Clinically, it is mostly seen in atopic dermatitis, and patients may have a family history of inherited allergic diseases, while the triggering factors are closely related to seasonal changes, cold stimulation, and allergic asthma. Therefore, patients may be advised to visit the dermatology department for complementary blood tests as well as screening for allergens, which will reveal elevated eosinophils, along with elevated serum IgE. In the treatment, you can apply moisturizer around the body, followed by topical dinaide cream, if itching is obvious, you can also take oral levocetirizine hydrochloride tablets. 2, cholinergic urticaria: mainly in the running body temperature rises, stimulating the release of acetylcholine from nerve endings, resulting in the release of allergic substances by allergenic cells increase, there will be a circumferential windbag-like rash, accompanied by itching, which is an allergic skin disease . For treatment, you can take oral compound glycopyrrolate tablets and doxepin hydrochloride tablets, and for topical medication, you can mix topical mometasone furoate cream and urea vitamin E cream. Therefore, for patients who have itching all over their body after running, it is recommended to go to a regular hospital and under the guidance of a dermatologist for appropriate treatment.