What causes white spots on the back and arm?
Patient: My son of five years old has white spots on the skin. Especially on his back and arm. What s the cause of this spots? I noticed them this morning. He had a very difficult period this two months. He used antibiotics twice on March 2017 once for mycoplasma and once for throat infection.Thanks Doctor: Hello and welcome to healthcare magic.Your history points towards two possible conditions.1.is condition from family of eczema (allergic condition and reactions of skin) known as pitriyasis alba.This may be due to antibiotisc or any other triggering factor.Treated by topical steroids (that suppress immune reactions) moisturising and avoidance of trigger2.is a condition called tinea versicolor.It's caused by fungal infection of skin.It is treated by antifungals.The conditions are differentiated by dermatologist.They will examine your son's skin scraping under microscope if fungi are visible then this is tinea alba if not then its pitriyasis albaHope you find this answer satisfactory.Good luck