I Have a Bleeding Sore in My Mouth That Won't Stop

I Have a Bleeding Sore in My Mouth That Won't Stop

A sore in your mouth that bleeds easily or does not stop bleeding can be alarming. Here is what to do.

Mouth sores that bleed are common, but the context matters. A bleeding sore that does not heal or bleeds easily every time you touch it needs evaluation.

• Common causes include:
• Traumatic ulcer — a sore from biting your cheek or a sharp tooth edge; can bleed when disturbed
• Canker sore — can sometimes bleed, especially if large
• Gum disease (gingivitis) — swollen, inflamed gums that bleed easily with brushing
• Blood clotting disorder — if you are on blood thinners or have a bleeding disorder
• Pyogenic granuloma — a benign, red, rapidly growing bump that bleeds very easily
• Oral cancer — a cancerous sore may bleed easily because the tissue is fragile

What to Look For

• Usually not serious:
• Bleeding that stops with gentle pressure
• Sore that appeared after an injury
• Gums that bleed only when you brush or floss
• Heals within 1–2 weeks

• Worth having checked:
• A sore that bleeds easily every time you touch it — without a clear injury
• Bleeding that is hard to stop
• Sore that has not healed after 2 weeks
• Dark, clotted blood coming from the area
• You are on blood thinners and have unusual bleeding

When to See a Doctor

• See a dentist or doctor if:
• The sore bleeds easily and does not heal within 2 weeks
• You have a spot that bleeds every time you touch it
• The bleeding is difficult to stop
• You have a lump or growth that bleeds when touched
• You are on blood thinners and notice new oral bleeding
• You have other symptoms like numbness, pain, or a neck lump

Clinical Guidance