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It need to be examined to know whether it is just and abscess
or an fistula.
In case of fistula it need to be drained, which is already done by you. After that pain medication to reduce the pain and antibiotic to prevent and check the infection. In case absess if it is small there is no need of stiches, the pain is uaually well managed by pain killers, you need not to worry about the pain.
In case of fistula surgery can be performed at the same time as abscess surgery. However, fistulas often develop four to six weeks after an abscess is drained.
So i advice you to see surgeon after examination you can decide about the next step.
Hope i have provided the information you needed.