What causes an itchy roof of the mouth? - Patient At first the ulcer is painless, but later becomes painful. A lump on the lip or in the mouth. bump Sore throat. 1. Small bumps on tongue identified by doctors as potential … Give soft foods often, but do not force your child to eat. mouth Oral thrush is a fungal infection of the mouth. General (common) Side Effects [ Time Frame: 0 … coronavirus