Post-Surgery Complications: Anal Abscess and Symptoms - Surgery

Postoperative care for anal abscess?

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Hello, doctor.
I underwent extensive drainage surgery for an anal abscess on August 13 of last year, which involved the entire left side of my buttocks.
I continued to have follow-up appointments until November 19, when the surgeon said everything was fine, and I did not return for further visits.
However, in March of this year, I suddenly experienced swelling and pain in my buttocks, along with a significant amount of discharge.
I initially thought I had developed a fistula, so I went back to see the original surgeon.
After the examination, I didn't clearly hear whether the doctor referred to it as a "red nodule" or something else, but the doctor stated it was not a fistula and that surgery was not necessary.
The doctor then scheduled a colonoscopy, which returned normal results, providing me with some relief.
However, on April 20, a pus-filled bump (about 1-2 cm) suddenly appeared above my anus.
It was not painful and soon ruptured on its own.
After that, I experienced similar small pus-filled bumps on May 1, May 5, and May 8, which would also rupture on their own after about 4-5 hours and were not painful.
On May 3, I returned to the surgeon for another examination, and the doctor still could not identify any abnormalities.
A CT scan was arranged to check for any hidden cysts in my buttocks.
Consequently, on May 10, I visited a dermatologist to see if it was a surface skin issue.
The dermatologist suggested that if it was not an internal problem, it could be blisters caused by friction from the wound.
The doctor prescribed an antibiotic ointment and advised that if small pus-filled bumps appeared again, I could apply the ointment to help them resolve on their own.
Interestingly, since May 10, I have not had any small pus-filled bumps.
On May 31, after reviewing the CT scan results, the doctor stated that there were no signs of a fistula or other abnormalities.
I mentioned to the doctor that I still had some discharge from my buttocks, though it was not much—about the amount of a small cotton swab each time.
I also told the doctor that sometimes after using the restroom, I felt some soreness on the right side of my buttocks, which had not undergone surgery, but it was not significant.
The doctor reassured me that it was fine as long as I did not have a fever or feel restless.
However, I would like to ask the doctor the following three questions:
1.
I still have discharge from my anus; is this something that can occur in the general population, or could there be specific reasons for anal discharge?
2.
Sometimes after using the restroom, I experience some soreness in my buttocks, which feels more pronounced when squatting.
Is this normal?
3.
If a colonoscopy shows everything is normal and I have been eating a light diet, what could be the reasons for still experiencing diarrhea?
Thank you very much for taking the time to read my lengthy message, and I appreciate your help with my questions.

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Xiao Bo, 20~29 year old female. Ask Date: 2021/06/06