### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hello,Im a 19 years old male, 5 feet 11 inches, and 164 pounds. Ive recently noticed a roughly 2cm in diameter red (probably because Ive touched it), solid/firm lump next the bottom of my tailbone. It is not on top of the bone itself, but rather to the left of it, and on top of the skin there. It is painful when I touch it. There is no noticeable blood, pus, holes (as in the case of maybe a pimple or a bug bite). Im quite worried about this. Medical history: When I was a baby I had a condition where my intestines overlapped/squeezed my stomach? and I quickly threw up any bit of food I was given. I had a blood clot in brain a few years ago. Maybe 3 years ago, excluding for the most part this past year, I would feel as if my heart would skip beats randomly, It would be normal, then out of nowhere I would feel a very strong beat, and usually get quite dizzy, this would last anywhere from just one beat to continuing for a few minutes, and would happen on an off almost everyday for those two years, and it still occasionally happens now. Starting maybe last August my bowel movements completely changed, I would frequently (up to 14 times a day) have a sudden and painful urge to defecate. It was often diarrhoea, or at least not completely solid. I did start eating much more and changed a lot of my diet maybe two months prior to that, but had no symptoms prior to August. I went to the doctor for this, got a catscan and they found nothing. The painful frequent bowel movements continued, and I think maybe last January, or February the feces became a bit more solid and it wasnt so painful, but still frequent. Lately, Ive been having some stomach pains in my upper stomach (right below my rib cage), the frequent defecating also seems to once again be very noticeable. Nearly 3 or 4 minutes after I wake up, I get the sudden painful urge to defecate. And the same thing happens almost every 2 hours for the rest of the day.Thanks

### output:

HI, Dear, Thanks for the query from you for your 2 cm, red painful hard-lump at the tailbone? .1-I am happy that you are serious to know why this painful tailbone-lump occurs?2-In my opinion this 2 cm sized red firm solid painful lump is of the -infected colonial cyst and is infected with the cellulitis and induration of the tissue in it and around.3-Though the medical history is elucidative, does not appear to be relevant to the main lump question and is diverting from the main question and hence needs no comments.4-But would explain, why this red lump occurred now-is due to the extensive stress leading to the infective colonial sinus to crop up on the tail bone.5-I would advise General surgeon to Chat Doctor. 6-Hence I would suggest you to go to ER Surgeon or the orthosurgeon for the evaluation and treatment of such cases.8-Hope this would resolve the causative worry of the patient in question. If treated on this line, the fearing patient, should not worry you much.9-Hope this would solve your worry of the red painful lump.10-Wellcome to Chat Doctor for any more query.