I don't totally agree with dunczn you should have lumps in your body checked by a dr. It's more then likely a harmless cyst but you can never be sure. Also a cancerous growth are often times not painful in the early stages
Lumps around the breast area are quite normal in teenage girls and even older women and for the most part, they are painless and harmless. However, if the lump is painful to the touch, you should see your doctor as soon as you can for tests that will determine exactly what the lump is.