It is 4 or 5 days i feel pain on the arm pits - most commonly on the left. it started after i had a flu.. pain is not strong but i have a discomfort.

Lymph nodes: You have lymph nodes in the armpits which can become inflamed and tender with viral infections. Try Ibuprofen to assist with the discomfort, but it should resolve in a few days.

Arm Pit Pain: The cause is most likely swollen lymph nodes as a result of the immune response your body mounted to the virus. There are also many other possible causes: http://www.Buzzle.Com/articles/armpit-pain-causes.Html. Sometimes one can experience a protracted post-ictal flu syndrome that lasts for weeks. If you don't get over your symptoms, check with your doctor, but bilateral pain will likely subside.