Hi clarck, Thanks for writing in. You seem to have postinflammatory hyperpigmentation. For pigmentation as a general rule- Avoid sun exposure Use a good sunscreen of SPF 30 and repeat application every 3 to 4 hours Take antioxidant and vitamin c supplements . As the area of pigmentation is large some internal medication should be taken and external treatment would be of little use. Glutathione supplements are available as capsule and injections they can be very useful. You need to consult a dermatologist as dermatology being a visual field,the treatment required can only be suggested after proper skin examination. Some procedure can be helpful like dermabrasion. Take care. DrSudarshan MD Dermatology