Sim pitch black

I just wanted to help whoever may need it . My sim was pitch black after playing for literally a whole day and I couldn’t figure out why i used tray importer took out everything that was bad I turned off mods and removed them and did a repair and still nothing and then I read that it was the tattoos so I took them off and she was back normal so that definitely works I just don’t understand why it only happened to one sim when multiple sims have tattoos in my game . Was wondering if anyone knew why ? Thanks in advance