Hello doctor, My father has a swollen lump under the skin of left arm since long. It's neither causing any pain nor increasing in size. But since last few days(3,4 days ) he has been experiencing pain near the elbow of left arm. Earlier to that, he had experienced pain near the shoulder joint of left arm. Now, the pain is near the elbow which is close to that swollen lump. We thought it's lipoma for that we didn't bother about that since beginning. His blood pressure reading is in normal range now and his cholesterol level is nearly okay. What could be the cause of pain in left arm ? Which medicine should he take ? I have attached the pic of that area. please advise. thank you.