It is impossible not to pay the medical expenses. Three stitches on the arm is actually not serious, depending on what industry the other person is engaged in. If you are not engaged in manual labor, it will not affect your work, and you don't need to pay for lost time. 1000 at most, and then detained for five days at most. In fact, if the other party accepts it, there is no need to detain it. I didn't think this case could be detained at all. . .