My son has a lump inside his tongue on the tip, i am going to take him to the dr but until i can get him in i wanted to see what it may be.?

Need more info: What color is it, how big is it, does it hurt, how long has been there? Theses questions and others need to be addressed before we can give you a meaningful answer. Best to have his doc look at him. Usually these things are benign but definitely have it checked out.

Taste buds: Common to see inflammed taste buds, normally go away on their own within a week. If not, see your dentist!

Needs to be seen: Unfortunately, this types of situations actually have to be seen by a trained health care provider.

A lump.: Until it is examined, and possibly a sample looked at under a microscope, you really can't tell. If your son remembers biting that spot or injuring it in some other manner, it may just be a scar, but again, it's only a guess until looked at properly.