This situation should be caused by partial incomplete healing. Incomplete healing, local ring removal can cause irritation and injury reaction, resulting in secretion exudation. If there is no redness and pain around, there is no obvious inflammatory infection.
Suggestion:
It is suggested that potassium permanganate solution should be used locally to clean, diminish inflammation and reduce swelling after ring removal. At the same time, wet compress with iodophor and proper local protection with vaseline gauze can heal quickly.