Tinea Versicolor:
A parent's guide to condition and treatment information

If you suspect that your child has tinea versicolor, you might try an over-the-counter antifungal cream such as terbinafine, clotrimazole, or miconazole. An over-the-counter shampoo containing selenium sulfide can be used as a lotion by applying it to the affected areas overnight and rinsing it off in the morning. However, if the condition does not seem to be getting better after 2 weeks of daily treatment, see your child's doctor or a dermatologist for evaluation.

If your child has been treated for tinea versicolor, he or she should avoid wearing tight, restrictive clothing. Also, sun exposure may make the light-colored areas more apparent, so have your child avoid sun exposure or wear sunscreens until the spots have returned to their normal color.
If the above self-care measures do not work or if your child develops a widespread rash that seems to be getting worse, see the doctor.