Conversation: The conversation between human and AI assistant.
[|Human|] 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 ?
[|AI|]  Hello hope the answer helps you. As you have a large sized contender lump which hurts on flexion and extension. As sir, you donors have local inflammatory signs and not running fever, so it is unlikely to be abscessed, boil or fur uncle as having pus. It could be any lipomatous swelling as lipoma, or containing nerve fiber 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 forearm BCO of size. You don't worry if not associated with any systemic upset as Gastrointestinal tract or respiratory better consult general surgeon sir hope the answer lessen your anxiety