Frequent itchy underarms are considered to be related to folliculitis, eczema, prickly heat and other factors, which can be treated by topical medication, oral medication and daily care. 1. Folliculitis: when the patient suffers from folliculitis, it will also trigger the symptom of frequent itching in the armpit, and at the same time, there are localized red pimples, with white or yellow pus on the top of the symptom. Patients can cooperate with the doctor to apply local erythromycin ointment, gentamycin hydrochloride ointment and other medications, which can play an antibacterial role. 2. Eczema: If localized contact with allergens, eczema can also be triggered, resulting in frequent itching in the armpits. Patients can cooperate with doctors to take antihistamine medication, such as ebastine tablets, chlorpheniramine maleate tablets, etc., which can effectively block allergens and relieve itching symptoms. 3. Prickly heat: If the armpit sweats a lot, it will trigger prickly heat, resulting in frequent itching symptoms. Patients should pay attention to the dryness of the skin in the armpits and change clothes in time. If necessary, you can apply local glycerine lotion, hydrocortisone butyrate cream and so on to relieve the symptoms of itching. When the patient has frequent itchy underarms, you need to go to the hospital to find out the cause, and clarify the cause of the standardized treatment.