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What to do if…
you have sudden heavy vaginal bleeding and feel dizzy

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Lie down, use a pad, and get urgent help now. Call 999 if you feel faint, have fainted, are soaking a period pad soon after putting it on, have severe tummy or pelvic pain, shoulder-tip pain, or pregnancy is possible and you feel dizzy.

Do not do these things

  • Do not drive yourself to A&E if you feel dizzy or faint; ask someone else to drive you or call 999.
  • Do not use a tampon, menstrual cup, or douche right now; use a sanitary pad or period pants so the bleeding can be checked.
  • Do not wait it out if you feel faint, very weak, confused, short of breath, very pale, or the bleeding is rapidly heavy.
  • Do not take aspirin for pain unless it has been prescribed for you.
  • Do not take extra doses of hormonal medicine, blood thinners, or any other medicine to try to stop the bleeding unless a clinician tells you to.

What to do now

  1. Get into a safer position immediately. Sit or lie down. If you feel faint, lie flat and raise your legs on a pillow or chair. Keep your phone within reach.

  2. Call 999 now if any emergency sign is present. Call 999 if you have fainted, cannot stay upright, feel very dizzy, look very pale, have severe or worsening tummy or pelvic pain, shoulder-tip pain, heavy bleeding that soaks a period pad soon after putting it on, or pregnancy is possible and you feel faint, dizzy, sick, or have severe pain.

  3. Use NHS 111 urgently if it is not clearly a 999 situation. If you are bleeding outside your expected period and feel dizzy but do not have the emergency signs above, use NHS 111 online or call 111. If you worsen while waiting or cannot safely stay upright, call 999.

  4. Treat possible pregnancy as important even if you are unsure. If you could be pregnant, have missed a period, have a positive or uncertain pregnancy test, recently gave birth, recently had a miscarriage or termination, or have an IUD or IUS, tell 999, NHS 111, A&E, or the maternity or early pregnancy unit.

  5. Switch to a pad and note only the key details. Use a sanitary pad or period pants. Notice when the bleeding started, whether it is getting heavier, how often you are changing pads, whether blood is soaking through clothes or bedding, whether there are large clots or lumps, and whether there is pain, shoulder-tip pain, fever, faintness, or sickness.

  6. Get someone with you if possible. Ask a friend, housemate, neighbour, or relative to stay with you, help with the call, and keep you away from stairs or driving while you feel dizzy.

  7. Have essential information ready for triage. Say your age, whether pregnancy is possible, your last period if you know it, any recent birth, miscarriage or termination, contraception including an IUD or IUS, current medicines especially blood thinners or aspirin, known bleeding disorders, and any new fever, pelvic pain, shoulder-tip pain, or fainting.

What can wait

  • You do not need to work out the cause right now.
  • You do not need to decide about tests, procedures, contraception, or longer-term treatment while you feel dizzy.
  • You do not need to keep changing clothes, tidy up, or clean the area before getting help.
  • You do not need to be sure whether this is a period, miscarriage, infection, hormone problem, or something else before contacting urgent care.

Important reassurance

Sudden heavy bleeding with dizziness is a valid reason to seek urgent help. Using 999, A&E, NHS 111, or a maternity or early pregnancy route is not overreacting; it is the safest way to be checked and treated if the bleeding or dizziness is becoming serious.

Scope note

These are first steps only for the immediate situation. Later decisions about tests, treatment, pregnancy care, medicines, contraception, or follow-up may need help from a clinician or another appropriate specialist.

Important note

This is general information, not a diagnosis, and not medical or professional advice. If you feel you might pass out, have severe pain, have shoulder-tip pain, are pregnant or might be pregnant and feel dizzy, or the bleeding is heavy and unusual for you, seek urgent medical care immediately.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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