Hi Tks For Your Time And Info...I Hae ( I

Hi tks for your time and info...I hae ( I think a cysts) on my back near my left shoulder blade area...it kinda comes and goes in irritation...sometimes a little soarer then at other times...I pricked the area about a yr ago and leaked some blood and puss...went down...But started getating more touchy and laarger in the last few days or so...but nothing coming out ...does this sound like a cysts...its kinda reddish in color and kinda spunge in the touch...