Complications from nozzle faults and their treatment

An oblique nozzle lets no fluid in and must be straightened; a very thick, rough nozzle injures the anus; a split one or one with the ring too near lets the fluid flow back; a ring too far or a nozzle too long wounds the anus and causes bleeding, treated as excessive bleeding; very fine or faulty holes let nothing pass, and a short nozzle acts like gentle pressing. Faulty nozzles are to be discarded.