Bloody Mucus with Sinus Infection: When to Worry

Blood-tinged mucus during a sinus infection is common and usually benign. Inflamed sinus mucosa becomes congested and fragile, causing minor bleeding that mixes with mucus.

Typical Presentation

• Streaks or specks of bright red or dark blood in mucus
• Occurs with blowing nose or in morning
• Resolves as infection clears (7–10 days for viral; longer for bacterial)

Red Flags – Seek Medical Care If:

• Heavy, persistent bleeding (not just streaks)
• Severe headache unrelieved by OTC meds
• High fever (>102°F / 39°C)
• Persistent facial pain/swelling
• Vision changes, eye swelling, or double vision
• Neck stiffness, confusion, or altered mental status
• History of bleeding disorders or anticoagulant use

These may indicate complications (orbital cellulitis, intracranial extension, tumor) or unrelated serious conditions (nasal tumor, vasculitis).