Itchy bumps in the armpits are commonly caused by the following reasons: first, long-term not properly cleaned or sweating caused by local follicle infections, which can generally be cleaned locally, apply iodine povidone or mupirocin ointment and other treatments, the symptoms can be gradually relieved. Second, local parasitic disease caused by, this can be the armpit hair removal, the use of topical drugs for treatment. Third, localized eczema, which can be applied to some drugs, such as Parasol ointment for treatment. Fourth, there are other reasons, such as eating inappropriate food, such as too spicy food, chili peppers, long-term alcohol or eat some easy to cause allergies caused by the drug, which need to adjust the diet structure, can be appropriate intake of vitamin-rich fruits, apples, kiwi and so on, stop taking medication to carry out the treatment. In short, if the itching discomfort persists, you need to go to the hospital in time to clarify the cause of the disease.