Wet Hair and Nosebleeds: Separating Fact from Fiction

No scientific evidence links sleeping with wet hair to nosebleeds (epistaxis).

Actual Causes of Nosebleeds

• Anterior (90%): Kiesselbach's plexus (anterior septum). Trauma (picking, blowing), dry air, rhinitis, deviated septum, anticoagulants, topical steroids.
• Posterior (10%): Woodruff's plexus (sphenopalatine artery). Hypertension, atherosclerosis, tumors, coagulopathy, trauma.

Wet Hair Myths

• Wet hair → cold → vasoconstriction → ? No plausible mechanism for epistaxis.
• May relate to "catching cold" folklore; colds cause rhinitis → nosebleeds.

Prevention

• Humidifier (30–50%), saline gel/spray, avoid picking, gentle blowing, control BP/allergies.

If recurrent or severe → ENT evaluation (cautery, packing, workup for HHT, coagulopathy).