Hi welcome to HCMForum. As your description suggests it may be vitiligo
. where the patches are usually white in colour. but if haemoglobin
is upto the mark the patches may look red.
I advise you to consult a cosmetic dermatologist
for diagnosis and treatment.
Besides i advise you to follow some diet recomendations as give more of green leafy vegetables pulses sprouts fruits juices milk and sea foods. They will provide proteines b complex
Vit A E C necesosy for health of the skin. Thanks for calling.