What to do if I had a bacterial infection/ pneumonia and it turned my face skin a darker shade.?

Side effects of skin. I wonder if you may have experienced a side-effect of the medication you were given for the infection? Some medications like doxycycline are given for pneumonia, and can result in a skin rash- particularly of sun-exposed areas. I would try to review with the doctor that treated you. Infectious diseases specialists know alot about infections and their proper treatment, as well as side effects.