Hi, thanks for writing to HCM. Well, if I were your family physician and had you presented this painless anal lump, I would consider following possibilities: 1. a rara-rectal cyst 2. an internal piles 3. a rectal polyp 4. a skin tag / papilloma 5. a tumor even could be malignancy! And, the joint-aches or cold has nothing to do with the lump; they are separate issues... therefore you need to get to your doctor for a simple per-rectal examination and relevant tests like proctoscopy, stool examination, etc. if necessary! ... Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.