I'm 18 years old, 5 foot 3 and 180lbs. I have very itchy pimple like bumps under my chin and jawline, sometimes they have a tiny pus bubble but they're most often just red. They also get really inflamed and start to crust over. I think they're spreading to my shoulders too. I've never had acne but now now my face is breaking out horribly with the same effects. I think this may be an allergic reaction.