On Chritmas eve I started itching all over my body a week later I went to the dr and he treated me for scabies. Another week went by and the itching got worse and i went to a dermatologist and he said he did not think scabies but and allergic reaction. he treated me with steriods, and i bought a medicated lotion and I feel alot better but the itching continues on my chest, breast, and shoulders and low back. But now I also am having a burning pain in my left shoulder (with no injury) and neck, Could any of this have anything to do with the other and what could it be,