Don't worry it is not vitiligo or leucoderma it is generally happens in children due to their low immunity so keep watching his diet. Improve his immunity this patch will automatically disappear.
I will provide you some homoeopathy immunity medicine and diet chart for this white patch so child will recover fast and homoeopathy is completely safe .
Next Steps
Do consult with me on my practo vedio call or text me on my insta Jovi_healthcentre.
Health Tips
Avoid sour and spicy food , improve child diet and don't give him sun exposure after 9 am or before 3 pm.