Why am I having a tender lump beneath skin near anus?

Hi,

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After reviewing the information shared and your pictures (attachment removed to protect patient identity), it appears you are suffering from Fistula -in Ano (tubular interconnection between anal canal and outside skin near the anal opening). The swelling you are talking about is called perianal abscess. It is a swelling because of infection of some anal glands. Around 30 to 40 percent perineal abscesses are associated with a fistula. In your case having a couple of good quality pictures of the anal region can help in suggesting further treatment. Your MRI (magnetic resonance imaging) report reported presence of around 0.78 inch size fistula, with no abscess at the time of imaging and no higher up extension. This is a good prognosis type. It will need either of two things (There are many treatments possible but for you I would suggest these), which can be, thread insertion in the fistula a tightening it every week, this treatment is called "Cutting Seton", you can use Shar-sutra or Silk thread and another one is surgery to take the fistula out and let the area heal by itself over time (four to six weeks). This can lead to loss of incontinence as well (control on stool holding).

What to do now is you need to follow-up with a surgeon to do any one of the above two suggested treatments. Do sitz bath - take lukewarm water in a tub put a half a teaspoon of ordinary salt in it. Now sit in this water and try to make the water clean and sooth your anal region. Sit for around 15 min, three to four times everyday. Try to do at least twice per day. It will decrease itching and help to heal the fissure (as reported by you in your info provided). Avoid constipation with a large platter of salad, sprouts or Sat-Isabgol 2 teaspoon three times per day. Take 0.7 to 1 gallon of water, measured by a bottle, measuring cup everyday. In case you need more information and help regarding what to choose and why, kindly follow-up with a couple of good quality pictures of the fistula site or discuss it with your local doctor.