If the white spot is only visible with a flashlight, not increasing in size, and not painful, it is usually harmless. It can be a normal variation of the tongue surface, mild frictional change, or simple coating. Since your doctor has already examined it and said it is normal, that is reassuring. You should get it checked again if it increases in size, becomes painful, causes burning sensation, or does not improve for more than 2–3 weeks. Maintain good oral hygiene, clean your tongue gently, drink plenty of water, and avoid tobacco if applicable. If you are still concerned, consult a dentist or oral physician for proper evaluation.

Hello Looks absolutely normal, but if you feel any burning sensation or difficulty, please visit the dentist for physical examination

Hello Nothing serious signs seen Not to worry

Nothing seems serious If you are feeling any discomfort or burning then have to be seen again after 15 days otherwise no worries.

Seek medical attention if the white spots are accompanied by pain, burning, or if they persist for more than two weeks, as they can sometimes indicate more serious issues, including cancer. Maintaining good oral hygiene (brushing, tongue cleaning) is often the first step in resolving these issues. 

It is perfectly normal,may have appeared due to,decreased pigments of the tongue speciffically in that area or may be increased vitamin A causing this in some area