I have a lump under my skin at my waste line it was a little red above the lump on the skin a week or two ago there was a pimple type thing where the lump is now
there's no pain or discomfort .?
Sounds like a infected sebaceous cyst> you may need to see your doctor for evaluation.
In the meantime you could try hot compresses and may be topical antibiotic creams and see whether the redness resolves.
CHEST PAIN OR DISCOMFORT