sir, a white patch of dia 1.5 cm generated on her neck (below chin) at 15 years of age at allahabad. she got treatment from dr bajaj at allahabad and found starting of skin spots on white patch. later we shifted to hyderabad and could not get medicines . progress of skin spots stoped. the patch not spread. we consult 5 determologists and followed treatment but not cured till date. can you sugest what to do further.