my daughter by age 4yrs old ..I saw a white patch on her face..

A. White spots on the body and face could be some fungal infection or some conditions like Pityriasis Alba whichy3j is aggravated by dryness of the skin it needs proper clinical evaluation by the doctor. Proper moisturisation of skin is very important for this you can use a good cream like atogla and maintain a good hygiene .