Doctor, I'm Tuan, 27 years old, 1.5 months ago I had a tonsillectomy at the hospital using the Plazma method. Currently, the incision has completely healed, however, in the last 2 weeks, one side of my tonsil has appeared a boil, which looks like a blister but it is not painful to the touch, does not cause pain, does not cause difficulty swallowing.