Your white patches can be vitiligo.If you feel that your skin disorder area is non panic.Vitiligo patches can speard any parts of body.Some people might mistake it as skin disorder disease brought about by too much work on sun exposure.Vitiligo white patches can appear in sun exposed area of the body.like

Hands
Feets
Arms
Face
Lips
Hips
Breast
Chest
Armpits
Groin
Mouth vitiligo patches can appear in inside of mouth(nearst inside lips)
Vitiligo white patches disorder peoples are 40 to 5o millions of the world.