I have pea to marble-sized lumps under the skin of the insides of both triceps, near the bicep.  They are in identical locations, almost midway between my armpit and elbow, a bit closer to the elbow.  Very tender to the touch, but no trouble otherwise. Ive had them for quite a while, more painful at times than others. Thank you.
Hi. You can go for FNAC, fine needle aspiration cytology to get a diagnosis. If the lumps are painful, they should be removed in toto and subject to the histopathological examination. BY this way one removed the disease and the discomfort associated with them.