Suggest treatment for hard painful lump on the arm
Patient: Shot up MS Contin yesterday and almost immediately got a large golf ball sized lump. Is not growing in size nor is it red, black or blue. Just very tender. It hurts to extend or flex my arm. Today (the next day) I have a dull ache shooting down my arm into my pinky fingers (feels like it s running down the bone). What could this be ? Doctor: Hello hope the answer helps you.As you have a large  sized nontender lump which hurts on flexion and extension.As sir you donont have local inflammatory signs and not running fever so it is unlikely to be abscess,boil or furuncle as having pus.It could be any lipomatous swelling as lipoma,or containing nerve fibre as neurofibroma till proven or ganglion like cystic lesion along synovial tendon sheath.Dull ache I guess is due extrinsic compression over nerves going in arm and foream bcoz of size.You dont worry if not associated with any systemic upset as Gastrointestinal tract or respiratory  better consult general surgeon sir hope the answer lessen your anxiety