Bump on armpit ..?

i have one bump on my armpit. it's not red or anything. but it kinda hurts when i touch it. any impression what it may be? ><Bump on armpit ..?
It could be a swollen lymph node, or just and ingrown mane. If it doesn't go away jump see a doctor or a dermatologist.
How big is it? If it is a small bump on the surface of your armpit, it could be nothing. But if it is a lump, sort of below the surface(If you know what I mean), it could be a tumor...shift to a doctor and have it checked out.
could be an inflamed lymph node especially if you are getting over anyone sick
http://www.mayoclinic.com/health/swollen...
A swollen lymph node, an ingrown hair follicle, a sebaceous cyst, or a tumor.
You may enjoy what is called a lypoma, or a fatty tumor. Have you by any accidental changed your deoderant or laundry detergent? This can cause inflamation beneath the arms. Good news is that if it hurts it usually isn't the worst you can devise. But you should have it checked if you haven't done or are using something clean under your arms.
Sounds resembling an ingrown hair. Hot pack it next to a tea bag or melt wash cloth to draw it out, it will be aware of much better in the morning.