Developed a darkened area of skin along my grion. It is only on one side & I have no other symtoms! Using doctor prescript ketoconazole no change.?

Hyperpigmentation. Postinflammatory hyperpigmentation (pih) is a frequently encountered problem and represents the sequelae of various cutaneous disorders as well as therapeutic interventions. This acquired excess of pigment can be attributed to various preceding disease processes that affect the skin such as infections, allergic reactions, mechanical injuries, reactions to medications, trauma and others.