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Hi and thanks for the query.
This is post burn scar alopecia. since this was a deep burn most likely a third degree at this area, the hair follicles have burnt and once burnt they do not regenerate. And because there are no hair follicles no medication can promote growth in this area naturally. There are a few treatment options for this, the best option is a hair transplant by a minimally invasive follicular unit extraction (FUE) technique, in which under local anesthesia the hair transplant surgeon takes individual follicular units of hair out from the donor area, the back of the head and transplants them in the scar. These hair grow naturally there after. The other way is to serially excise this patch of scar until all of it is gone and the adjacent hair are approximated, this can be done in 2 or 3 stages and under local anesthesia in your particular case judging by the size of the area. The third option is to insert a tissue expander in the adjacent scalp and expand it for 3 months and in the next stage excise the patch and resurface the area with the expanded scalp skin. All procedures have their pros and cons but the hair transplant technique is the most superior with the best results, since it is single stage and can be done with minimal complications.
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