Grid is right, it can be a symptom of more serious illnesses like NPC.
Sorry, I don't want to scare you. It is a kind of cancer near the nose.
One of my friend had this and this is the first symptom he had.
If the symptom doesn't go away, tell the doctor to test for NPC to be safe.
靠,有那么严重吗?
俺都耳鸣一年了,有啥好办法?