Hi I Was Initially Taking Oxycodone 5mg For Spinal Stenosis,

Hi I was initially taking oxycodone 5mg for spinal stenosis, I would have to take 2 pills for the pain to go away, so on my next visit, my doctor just wrote an RX for oxycodone 10mg... the irony it that I am now getting a rash on my face.. whereas when I just took the 2 5 mg I didn't have this problem, what could be the reason, the only thing I can surmise is that the 10mg pill is pink, and I am wondering if it is the dye... I am tired of being in pain. I have developed a tolerance to vicodin, most likely because of the uterine fibroid tumors I had. please help, what should I do