Hello Obviously prolong sitting in chair or work out without proper care and changing of postures can lead to cracking of the skin around the anus or rectum leading to formation of fissures or hemorrhoids Since I can t physically examine you to get more clues so In my opinion you should see a doctor for clinical and per rectal examination to confirm the diagnosis I see patients with similar complaints in my clinic and I would advise them to avoid constipation by taking laxatives or stool softening agents like lactulose or liquid paraffin Avoid prolonged sitting in one posture Say no to smoking and alcohol Have lots of dietary fibers and fresh fruits or vegetables to keep colon healthy. lignocaine ointment can be applied for the pain site bath twice daily will definitely help you Hope this answers your question Wish you good health