Tongue having white coating and some area having tiny red bumps. what is it? roof of mouth is little yellowish. dont smoke and drink.

Watch for infection.: It could be only an irritation due to something that you ate or drank. Or just a lack of proper hygiene. Make sure you brush your tongue and teeth after eating. Watch for sweets and milk. Rinse with salty water with a drop of peroxide. If hurts, see a dentist or physician.

Can't see: Cannot diagnose without examination. May be Thrush, normal or abnormal salivary glands, oral hygiene problem, allergy, food choices, systemic disease, and so many other possibilities. Please see a Dentist for evaluation.