Is it normal to have yellow bumps on the side of your mouth by your tonsils and on the back of your tongue? i don't brush my teeth often.

Yellow bumps: This sounds like you have folds, pockets or divets where food and bacterial debris can accumulate. This can set up a low grade infection process that can flare up an become serious if not monitored and/or cleaned out sufficiently.

See a dentist: It is hard to answer your question without seeing your mouth. There are some bumps on the back of the tongue that are normal anatomy. The yellow bumps may be tonsil stones or food and bacterial debris. Your dentist can tell you what they are. As for the not brushing your teeth, why don't you brush? It is important health procedure, prevents cavities, bad breath, health problems. Start today.