Underarm bumps may be caused by axillary folliculitis, axillary lymph node enlargement and subcutaneous lipoma, etc. You can choose antibacterial drugs, anti-inflammatory drugs and glucocorticoid drugs or surgery for treatment. 1. Underarm folliculitis: underarm sweating is not timely cleaned up, resulting in bacterial infection of the hair follicle caused by folliculitis, there will be the symptom of small bumps in the armpit, you can choose antibacterial drugs for treatment, such as mupirocin ointment and so on. 2. Axillary lymphadenitis: Inflammatory infection of lymph nodes leads to axillary lymphadenitis, which can cause the symptoms of armpit bumps, accompanied by redness and fever and other symptoms. You can take anti-inflammatory drugs for treatment, such as cefadroxil tablets. 3. Subcutaneous lipoma: abnormal proliferation of fat cells leads to subcutaneous lipoma, which will cause symptoms of armpit bumps, but the most common is benign subcutaneous lipoma, you can choose glucocorticosteroid treatment, such as fluoxetine ointment, etc. Surgery can also be chosen. Surgery is also an option. The use of the above medications should be in accordance with medical advice. When the armpits have small bumps, it is recommended that the patient go to the hospital for examination in a timely manner, after a clear diagnosis under the guidance of the doctor for treatment, do not take medication without authorization, in order to avoid adverse consequences.