Underarm itching should be selected according to the cause of the drug, if it is allergic diseases, you can use topical glucocorticoid ointment, oral antihistamine drugs; if it is infectious diseases, you can be treated by antibiotic drugs. 1. Allergic diseases: for example, contact dermatitis, eczema, urticaria, drug rash and other diseases caused by allergy, which will cause the symptoms of underarm itching. You can use compound dexamethasone cream, hydrocortisone cream and other glucocorticoid ointment, severe itching can be combined with loratadine, cetirizine and other antihistamines. 2. Infectious diseases: such as axillary follicle skin secondary infection, caused by folliculitis, can be used externally erythromycin ointment, fusidic acid ointment; if the fungal infection, can be used externally clotrimazole ointment, terbinafine cream and other medications; if it is a viral infection caused by herpes, can be used externally acyclovir ointment, spray acyclovir cream and so on. Itchy armpits may have other causes, need to go to the hospital in time to check, clear cause, standardized treatment under the guidance of the doctor.