A sudden, painful lump on the neck or back can be a sign of a severe cyst or abscess. While many skin lumps are harmless, a rapid increase in size, extreme redness, or throbbing pain means the infection could be spreading.
Medical experts warn never to squeeze or pop a severe swelling at home, as this can force dangerous bacteria deeper into your bloodstream. If your skin lump is hot to the touch or accompanied by a fever, you should see a doctor immediately to prevent serious complications like cellulitis.
