For the past few weeks my 10 month old keeps getting this rash around his mouth on the left side that I thought was a dribble rash. Pharmacist said to just keep it moisturised and could be from the cold. The rash faded but keeps coming back as a purple, blue bruise like mark, it looks like he has landed on his face and bruised it but he hasn't. It looks worse at certain times of the day. I was going to book doctors appointment but was worried about wasting their time. I've attached 2 photos, one of the rash how it started and the other of the left behind bruise like mark. Anybody know what it could be?