Why are nosebleeds common in pregnancy?

The nasal passages are lined with mucous membranes. In pregnancy, the blood supply to these membranes is greatly increased and the tiny blood vessels enlarge. This can cause small nosebleeds or nasal congestion, giving you the feeling of a blocked nose without any other symptoms of a cold. This congestion is often worse at night, or first thing in the morning, as the blood supply to the nasal passages is further increased when you lie down.

Should I worry?

The congestion is annoying, but nothing to worry about. Most nosebleeds are minor and will stop on their own. If you experience frequent or very heavy nosebleeds, or if you also have a severe headache or high blood pressure, you should contact your GP, midwife or maternity unit for advice.