Is it permissible for a woman to expose the knee and leg area to a female doctor for a peeling procedure to remove darkness?

It is permissible to remove flaws and deformities in the face or body, such as melasma, acne, and black spots, through natural, chemical, and laser treatments, as long as no harm results from it. This includes the use of permissible foods, due to the general evidence for the permissibility of seeking medical treatment.

Excluded from the prohibition of altering creation is what is done to remove a defect or disease, not merely for improvement. Therefore, it is permissible for a woman to expose her knee and leg for treatment, while exercising caution in covering what is not necessary to expose.