Red spot can be caused by trauma to the back of your tounge. A bite or cut can cause red bumps.scolding your tounge with a hot liquid or food can also caused red bumps.
Next Steps
these bumps is harmless, there is not huge amount of concerns about.but it is important to keep an eye on them.if they do not start to fade after time.consult your dentist.
Health Tips
you have also bed breath . please clean your teeth with dental scaler in dental clinic