Impure matters that exit the body through any passage other than the urethra and anus, but are neither urine nor stool, (Part No. 4; Page No. 113) such as nosebleeds, vomit, wounds, and the like do not invalidate Wudu' as long as they are not a large quantity. It is reported by
that the Prophet (peace be upon him) once vomited and then he performed Wudu'.
Ibn `Abbas (may Allah be pleased with him and his father): "If a large quantity is emitted, it (Wudu') should be repeated."
However, if only a small amount is discharged, Wudu' is not nullified. This is the opinion adopted by a group of Sahabah (Companions of the Prophet), such as
Abu Hurayrah, and
Ibn `Umar (may Allah be pleased with them), and no one of the Sahabah disputed this point. This opinion finds further support among a group of Tabi`un (Followers, the generation after the Companions of the Prophet). It is authentically reported on the authority of
Ibn `Umar (may Allah be pleased with him and his father) that he squeezed a sinus until blood came out of it, then he performed Salah without having performed Wudu'.
It is inferred from this account that the blood that came out was little.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.