Treatment for pigmentation varies depending upon the cause for the pigmentation and the degree of pigmentation.
In addition to depigmenting agents, you also need to protect yourself from sunlight to prevent worsening of the lesions. Dietary changes also help improve the outcome of treatment.
I will require photographs of the area along with more details such as medications you have already used, hence you can contact me via direct online consultation and I will guide you further.
Next Steps
Consult a certified dermatologist.
Health Tips
Do not self-medicate.