1. Multiple changes of medication are required after otitis media surgery, which usually takes about 2 months; 2. It is normal for blood to flow from the ear after surgery, which may last 2-3 months depending on the extent of the lesion and the surgery. 3. It is not normal to have purulent discharge or foul-smelling discharge at any time and needs to be seen as soon as possible. 4.After wound healing, you can take a shower, but pay attention to keep the wound dry and clean. 5.After surgery, try to avoid catching a cold. 6.Keep the outer ear dry and clean after surgery, but please do not scrub yourself inside the ear canal.