Welcome to HCM.
Tongue coating with red dots usually seen after decrease in salivation.
It usually occurs after consuming any hot food or hot drink,fever
and even after b12,folic acid deficiency
Sometime it recovers without any treatment but if it persist then it requires proper treatment.
B12,folic acid and other vitamins
Antifungal mouth gel is required sometime in recurrent cases.
Keep in touch with your doctor.
Take proper local care.