I have several hard pea sized lumps on my scalp. Its been there from past 7 years. They don't itch or pain. Does it indicate a severe health condition?

See your doctor. These symptoms can only be adequately diagnosed only after a thorough evaluation by your doctor. This may include labs and other satudies. Once all of the information is in, your doctor can let you know what's going on, and what to do to help you.