After wearing contact lenses, if there is red blood: First, it is a sign of local infection, which is a secondary infection caused after wearing contact lenses. In this case, anti-inflammatory treatment should be given, first of all, to stop wearing contact lenses. Second, choose local medication, such as levofloxacin hydrochloride eye drops or tobramycin eye drops. Third, to keep the eyes locally clean, if there is an increase in eye discharge, try to remove the eye discharge, which can make the eye disease recover faster. Under normal circumstances, if the symptoms are not very obvious, they can return to normal in a week or so. Only after the symptoms have fully recovered can you resume wearing contact lenses. When choosing contact lenses, it is recommended to choose better quality contact lenses that bring fewer side effects.