What should i use to remove ring worm scars fast?

Ring worm does not leave scars. There may be some increase in pigmentation and that will disappear with time. Interventions are likely to make matters worse. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV, Flu and Covid vaccines.

Ringworm does not leave scars. If you have real scars (and not just discoloration), you did not have ringworm, and should check with your doctor or a dermatologist. If you have discoloration (lighter or darker skin) in the area where the rash was, no treatment is necessary -- it will go away by itself eventually.