On both sides of my tongue there's white places that if i brush them they go away then randomly come back another spot. don't really hurt. ideas?

Bumps: This can be due to a virus or stress. Sometimes it goes away after 10days to 2 weeks, but see your physician or dentist for evaluation.

White on tongue: It could be several things and there is no way to know for sure without seeing your dentist. One possibility is oral thrush (candidiasis); or it might just be some common tongue plaque coating. See your dentist for a definitive diagnosis.

Spots on tongue: You may have a benign condition called geographic tongue- another name is migratory glossitis. With this condition you will have generally circular shaped lighter spots ( about a quarter inch in diameter, ) which may move around on the surface of the tongue. At times they may get irritated or inflammed, but in general, the condition is harmless.

Candidiasis: It could be a fungi infection like candida common in patients with compromised immune system. Visit your dentist for an evaluation/lab.