greetings, if it is not itching sensations are intact, probably nothing to worry . still it may be due to mineral and vitamin deficiency, First massage and sun bath, Give Vit D3 granules 3 lakh iu / granules. Dissolve in a spoon of water and feed only once, we repeat it after 15 days ,Start with tinaderm locally. Keep Hygiene . Boil all clothes and dry in sun or do ironing, Continue for 1month. Treat other members along with the child Check for sensation of skin of the lesion..

This is likely to be minor skin allergy. It is quite common and goes away with time. Change soap to a mild cleanser like cetaphil bar soap and use cetaphil moisturizing lotion. Contact again if not better in 1 week