Hi, I'm 18 and a few weeks ago I discovered a hard, painless, pea sized lump under the skin in my left buttock. I didn't think anything of this at first, but after searching what it could be, I'm now very concerned.

I will be getting in contact about it with my GP ASAP and whilst I know that all I can do is wait and see what happens, I'm terrified because the lump fits the description of a sarcoma and if I go to the doctors and they send me for tests and things and it does turn out to be cancer like I think it is, I don't think I'll be able to cope.

I'm very scared and haven't been eating or sleeping well because of it and I don't really know what to do.