Noticing a new bump on your body can be alarming, but often there is no reason for concern. There are many causes for underarm bumps and a doctor can tell you definitively what is causing yours. Before you consult your doctor, it is a good idea to do a breast check to see if there are any other changes---breast cancer can sometimes appear on a person as an underarm lump, according to MedlinePlus.
Self-Examination
You can perform a breast check at home or, if you are not confident, make an appointment to see a nurse to have the check done. The lymph nodes under your arm are connected to the lymph vessels in your breasts, so an unexplained bump in the underarm should not be ignored. Check your nipples for any color change or discharge and press and knead your breasts to feel for any other bumps.
Common Causes
There are many causes for an underarm bump, many of them innocuous. Shaving and antiperspirants can cause cysts and infections, according to the University of Maryland. Switching to a deodorant instead of an antiperspirant and replacing your razor regularly can help to prevent an infection in the future. Abscesses can also appear under the arm and can be painful. Sometimes the lymph nodes can become swollen as a result of a virus, vaccination or bacterial infection.
Doctor's Examination
Your doctor will often perform a physical examination on the bump if diagnosis is not possible on sight. If you are breast-feeding or have any other symptoms, mention these details to your doctor. According to PubMed Health, a service provided by the U.S. National Library of Medicine, your doctor may order a number of tests, including an X-ray, blood work, liver or kidney function tests, or a lymph node biopsy.
Treatment
Your doctor will be able to advise you on your treatment options. For some causes of an underarm bump, such as that caused by a virus, the bump will go away without treatment. A cyst will often not need any treatment, unless it grows or becomes painful. If your doctor does not see a need for treatment, a hot compress or over-the-counter pain relief medicine can be effective. Do not pick at, lance or squeeze the bump at home, as this can cause serious infection.
Warning
Even if you think you have identified the cause of the bump, see a doctor for a second opinion. An underarm bump can be a sign of a more serious illness and should not be ignored.
