If you have a small hard lump in your armpit that is a little painful, it is recommended that you go to the hospital for a local ultrasound to clarify the nature of the hard lump. If the lump is caused by swollen lymph nodes, it is usually caused by inflammation of the surrounding soft tissues, resulting in swollen lymph nodes. Local topical anti-inflammatory ointments, such as seven flavors of detoxifying and blood-activating ointment, clindamycin ointment, etc., are usually given to reduce inflammation, and oral antibiotics, such as cephalosporin antibiotics, clindamycin, roxithromycin, etc., are commonly used to eliminate the inflammation and the pain will be relieved. If the pain is caused by inflammation of the subcutaneous swelling, usually must also first anti-inflammatory treatment, anti-inflammatory methods are also in accordance with the above methods can be handled, but after the elimination of inflammation must be given to arrange for surgery to remove the swelling to solve the fundamental problem.