Yes, cocaine can cause nosebleeds. Cocaine is a vasoconstrictor, meaning it narrows blood vessels and reduces blood flow to the nasal passages, which can lead to irritation and damage to the nasal lining. Over time, this can cause chronic nosebleeds, a condition known as epistaxis. Additionally, cocaine use can cause other serious health problems, including addiction, cardiovascular problems, and respiratory issues. If you or someone you know is struggling with cocaine use, it is important to seek professional help.