 Next, our attention was paid to the face where 25% TCA solution was applied to two locations; one on the left cheek and the other one on the right cheek, where a hyperpigmentation/melasma. 
Next , our attention was paid to the face where 25 % TCA solution was applied to two locations ; one on the left cheek and the other one on the right cheek , where a hyperpigmentation / melasma .