I have a hickey on the left side of my neck, just below my ear.it looks like a sore compared to what it did a couple days ago. what can i do for it?

Will resolve: This will resolve in time and fade out as it is simply a bruise type injury. Hopefully, the skin did not break and there is not an infection setting in. I would put some ointment like Bacitracin or neosporin, keep the area clean, and cover with a band-aid perhaps. It should fade in a few days. If not or it gets worse, have it looked at by a provider.