I recently relasped on herion and Ben using for the past 2 weeks and I am an iv user well I been injecting in my legs top of things and I tend to usually bruise there anyway but not like this , this time it's went from blackish blue bruises to bright red iand yellow in middle and it a little swollen under skin but not much but it is getting warm as well im really worried a d embarressed to go to hospital unless it's serious. An u explain why it's turning the bright red color and not like previous times just regular bruising also I was in the vain to so I didn't miss it when. I injected so I'm curious to why it bruising this bad ?