Vomiting in the sink prevented a small coup.

Pipeline dredging agent, pure physics.

1, pipeline dredging agent. Pour an appropriate amount of pipe dredging agent into the drainage pipe and let it stand for a period of time. Then rinse with water, and use hot water if necessary.

2. Pure physical way. Unscrew the sewer and sewer pipe from below, clean up the hair and sundries inside, and then reconnect them. Be sure to pay attention to the sealing at the interface, and wrap some sealing tapes when necessary to avoid water leakage.