It is contagious and can spread direct contact with someone who has the condition, or if you touch contaminated items such as combs, hats,
clothing, or similar surfaces. I suggest you to get it evaluated from a dermatologist. Diagnosis is by clinical examination of the scalp as well as a skin lesion biopsy with microscopic examination.
Hope it helps. Take care and please do keep me posted on how your child is doing or if you have any additional doubts. Kind regards.