i have had a small pea like lump under the skin on my back for a while now which moved slightly when i touched it, however now it seems to have come on the outside of the skin and is a purple pigmented lump that almost looks like a mole surrounded by a purple circle.
Hello! Thank you for the query. If you have any suspicion that this might be the mole, please do not wait or ignore it. Consult dermatologist as soon as possible. If the lump is protuberant, it might be a sebaceous cyst which due to touching it or pressing it become infected and pus with blood has appeared around it. This could cause such color as well. In case of cyst, you should consult a surgeon and have it removed. Hope this will help. Regards.