ive been having on and of pain/ a weird sensation in my breast, cheats and upper arm( and sometimes my upper thighs) for the past few weeks. It switches from a numb feeling to itchy to burning and then pins and needles. It comes and goes throughout the day usually starting when I wake up . Sometimes it feels like my skin is burning cause when I touch it it feel hot. It has recently spread to other parts of my body like my arms stomach and upper thighs. What could it be?