Headaches during pregnancy are common, especially in the first trimester. They can happen because of hormone changes, tiredness, stress, low blood sugar, dehydration, caffeine changes, poor sleep, sinus congestion, or tension in the neck and shoulders.

Most headaches are not dangerous, but some headaches need medical attention. The goal is to know what may be causing the headache, what you can try safely, and when to call your OB-GYN or provider.


Headaches in Pregnancy: What Causes Them and What You Can Do?


1. Hormone Changes Can Trigger Headaches

Pregnancy hormones can affect blood flow, sleep, appetite, and how your body responds to pain.

This is one reason headaches can feel more frequent in early pregnancy.

You may notice headaches more when:

  • You are newly pregnant
  • You are very tired
  • You feel nauseous
  • You are not eating much
  • You are sensitive to smells
  • You are adjusting to less caffeine

If headaches are mild and improve with food, water, rest, or provider-approved medicine, they are often manageable. If they become severe or different from your usual headaches, call your provider.


2. Dehydration Can Make Headaches Worse

Pregnancy increases your body’s need for fluids. If you are not drinking enough, or if nausea and vomiting make it hard to keep fluids down, headaches can happen.

Signs you may need more fluids include:

  • Dark urine
  • Dry mouth
  • Dizziness
  • Feeling weak
  • Peeing less often
  • Headache with nausea
  • Feeling worse after being in heat

What you can do:

  • Sip water often.
  • Try ice chips.
  • Try cold fruit.
  • Try broth.
  • Try an electrolyte drink if your provider says it is okay.
  • Keep water beside your bed.
  • Drink small amounts instead of forcing a lot at once.

Call your provider if you cannot keep fluids down or you feel dehydrated.


3. Skipping Meals Can Trigger Headaches

Low blood sugar can cause headaches, shakiness, nausea, and weakness.

This can happen more easily in pregnancy, especially if you are nauseous or food sounds unpleasant.

What you can do:

  • Eat small meals more often.
  • Keep crackers by your bed.
  • Eat protein with snacks.
  • Try toast with eggs.
  • Try yogurt and fruit.
  • Try peanut butter on toast.
  • Try soup, rice, or oatmeal.
  • Carry snacks when leaving the house.

Do not wait until you feel shaky to eat.


4. Caffeine Changes Can Cause Headaches

If you suddenly stop drinking coffee, tea, soda, or energy drinks, you may get withdrawal headaches.

This does not mean you need a lot of caffeine. It means your body may react when your usual intake changes quickly.

What you can do:

  • Ask your provider how much caffeine is okay for you.
  • Reduce caffeine slowly if needed.
  • Track coffee, tea, soda, chocolate, and energy drinks.
  • Avoid caffeine late in the day if it affects sleep.
  • Do not use energy drinks unless your provider says they are safe.

A small amount of caffeine may be okay for many pregnant people, but stay within your provider’s advice.


5. Poor Sleep Can Lead to Headaches

Pregnancy can make sleep harder because of nausea, frequent urination, body aches, anxiety, reflux, or trouble getting comfortable.

Poor sleep can make headaches more likely.

What you can do:

  • Go to bed earlier when possible.
  • Use pillows for support.
  • Keep water nearby.
  • Eat a small snack if hunger wakes you.
  • Reduce phone scrolling before bed.
  • Keep the room cool.
  • Ask your provider about reflux, pain, or nausea if they keep waking you.

Sleep does not have to be perfect to help. Even small improvements can lower headache triggers.


6. Stress and Tension Can Cause Headaches

Tension headaches often feel like pressure around the forehead, temples, neck, or shoulders.

They may happen when you are clenching your jaw, sitting in one position, working long hours, or carrying stress in your upper body.

What you can do:

  • Change positions often.
  • Stretch your neck and shoulders gently.
  • Take short walking breaks.
  • Use a warm compress on your neck.
  • Try a cold cloth on your forehead.
  • Ask someone to massage your shoulders.
  • Check if you are clenching your jaw.
  • Rest your eyes from screens.

Small physical changes can help reduce tension.


7. Sinus Congestion Can Cause Pressure Headaches

Pregnancy can make congestion worse for some people.

A sinus headache may feel like pressure around your forehead, cheeks, nose, or eyes.

What you can do:

  • Use a humidifier.
  • Drink warm fluids.
  • Try saline spray.
  • Take a warm shower.
  • Sleep slightly elevated.
  • Avoid strong smells if they trigger symptoms.
  • Ask your provider before taking allergy or cold medicine.

Call your provider if you have fever, severe sinus pain, thick discharge, or symptoms that are not improving.


8. Migraines May Change During Pregnancy

Some people get fewer migraines during pregnancy. Others get more.

A migraine may include:

  • Strong throbbing pain
  • Pain on one side
  • Nausea
  • Vomiting
  • Light sensitivity
  • Sound sensitivity
  • Vision changes before the headache

If you have a migraine history, talk with your provider about a pregnancy-safe treatment plan before the next migraine happens.

Do not take your usual migraine medication unless your provider says it is safe in pregnancy.


9. Screen Strain Can Make Headaches Worse

Long hours on your phone, computer, or tablet can trigger headaches.

What you can do:

  • Take screen breaks.
  • Increase font size.
  • Lower screen brightness.
  • Avoid scrolling in a dark room.
  • Check your posture.
  • Look away from the screen often.
  • Use good lighting.
  • Get your vision checked if headaches are frequent.

This is especially important if you work on a computer or use your phone more when resting.


10. Posture Changes Can Cause Headaches

As pregnancy grows, your posture changes. Your shoulders, neck, upper back, and jaw may hold more tension.

This can lead to headaches, especially later in pregnancy.

What you can do:

  • Sit with your feet supported.
  • Avoid leaning forward for long periods.
  • Use a pillow behind your lower back.
  • Keep screens at eye level.
  • Switch sides when carrying bags.
  • Take short walks.
  • Use heat on tight shoulders.
  • Ask your provider about safe stretches.

Posture headaches often improve when the neck and shoulders are supported better.


11. Heat Can Trigger Headaches

Overheating can lead to dehydration, dizziness, and headaches.

What you can do:

  • Stay in cooler areas.
  • Wear light clothing.
  • Drink before you feel thirsty.
  • Avoid standing too long in heat.
  • Use a fan.
  • Take breaks in shade.
  • Carry water when leaving home.
  • Avoid hot baths or saunas unless your provider says otherwise.

Call your provider if headache comes with dizziness, fainting, weakness, or feeling very unwell.


12. Check Your Blood Pressure If You Are Concerned

A headache in pregnancy can sometimes be connected to blood pressure problems.

This matters especially after 20 weeks of pregnancy, but concerns can also happen postpartum.

Call your provider if you have:

  • A headache that will not go away
  • A severe headache
  • Vision changes
  • Swelling of the face or hands
  • Pain in the upper right belly
  • Shortness of breath
  • Chest pain
  • Dizziness
  • Nausea or vomiting that feels unusual
  • Blood pressure readings higher than your provider’s limit

Do not ignore a strong headache that feels different from normal.


13. Know the Preeclampsia Warning Signs

Preeclampsia is a serious high blood pressure condition that can happen during pregnancy or after birth.

A headache from preeclampsia may feel severe, persistent, or different from your usual headache.

Call your provider right away if a headache comes with:

  • Blurry vision
  • Seeing spots
  • Flashing lights
  • Sudden swelling
  • Upper belly pain
  • Nausea or vomiting
  • Shortness of breath
  • Chest pain
  • Feeling very unwell

If symptoms feel severe or sudden, seek urgent care.


14. Try Water, Food, and Rest First for Mild Headaches

For a mild headache, start with the basics.

Try:

  • Drink water.
  • Eat a snack or meal.
  • Lie down in a quiet room.
  • Use a cold cloth on your forehead.
  • Use a warm compress on your neck.
  • Turn off bright lights.
  • Take a short break from screens.
  • Loosen tight hair styles.
  • Change positions.
  • Take a gentle walk if you feel able.

If the headache improves, keep watching your triggers. If it does not improve, call your provider.


15. Use Cold or Heat Based on the Type of Pain

Different headaches respond to different comfort measures.

Try cold if you have:

  • Forehead pain
  • Migraine pain
  • Heat-related headache
  • Light sensitivity
  • Throbbing pain

Try warmth if you have:

  • Neck tension
  • Shoulder tightness
  • Jaw tension
  • Sinus pressure
  • Stress-related tightness

Keep it simple. Use what feels helpful and stop what feels worse.


16. Ask Before Taking Medicine

Do not assume every headache medicine is safe in pregnancy.

Ask your provider what you can take, how much, and how often.

In general:

  • Ibuprofen, naproxen, and other NSAIDs should not be used unless your provider says it is safe for your situation.
  • Some migraine medicines may not be safe in pregnancy.
  • Herbal remedies and supplements should be checked with your provider first.
  • Cold and flu medicines may contain ingredients that are not recommended in pregnancy.

Always check before taking anything new.


18. Keep a Headache Tracker

If headaches happen often, write down patterns.

Track:

  • Date and time
  • Pain location
  • Pain level
  • What you ate
  • How much water you drank
  • Sleep the night before
  • Caffeine intake
  • Stress level
  • Screen time
  • Blood pressure if advised
  • Any vision changes
  • What helped
  • What did not help

Bring this to your prenatal visit. It can help your provider see what may be triggering the headaches.