Recently had an abscess (located near my rectum ) lanced
Wound should not be closed.
As per your description, it looks like a Perianal Abscess or Ischiorectal abscess. It was incised and drained. The wound will be cleaned with Povidone-iodine solution and is kept open.
We do not close the wound as the pus should come out.
In your case, pus will be coming from the incision site. Please Consult your doctor and ask to make the wound big so that pus comes out easily.
In a few cases, a small opening will be formed in the skin discharging some material with communication to inside and that is called Anal fistula. If it is formed, the whole fistulous tract has to be removed.
Hope I answered your query. If you have any questions, I will clarify further.
Wish you good health