Itchy armpit bumps are commonly caused by the following reasons: First, local hair follicle infection caused by long-term lack of proper cleaning or more sweating, which can generally be treated by local cleaning, applying iodophor or mupirocin ointment, etc. The symptoms can be gradually relieved. Second, the local parasitic disease caused by, which can be removed from the armpit hair, the use of topical drugs to treat. Third, the local eczema caused by, this can be applied topically some drugs, such as Pirexone ointment to carry out treatment. Fourth, there are other reasons, such as eating inappropriate food, such as too spicy food, chili peppers, long-term alcohol consumption or eating some allergy-prone drugs caused by the need to adjust the dietary structure, the appropriate intake of vitamin-rich fruits, apples, kiwi, etc., stop taking drugs to treat. In short, such as persistent itching discomfort, need to promptly go to the hospital to clarify the cause of the disease.