Headache in Pregnancy: Common Causes and the Warning Signs
A headache in pregnancy is usually hormones, broken sleep, hunger or the chai you gave up. After 20 weeks it can also be the first sign of pre-eclampsia, and that one cannot wait: a headache with swelling of the face and hands, blurred or flashing vision, pain under the right ribs, or a blood pressure reading of 140/90 or higher means the doctor today, not the next appointment. Here is how to tell the two apart and what actually helps with the ordinary kind.
The headache that needs a doctor the same day
Pre-eclampsia is a condition of the second half of pregnancy in which blood pressure rises and the kidneys leak protein, and because it can come on quietly, a headache is often the first thing a woman notices. Any of the following, after 20 weeks or in the weeks after delivery, means the doctor or the hospital today. Not tomorrow.
A headache that is severe, throbbing, across the front of the head, and does not ease with rest and water. Vision changes: blurring, flashing lights, spots, or brief loss of sight. Sudden swelling of the face, hands or feet, especially if a ring that fitted last week is tight today. Pain just under the ribs on the right side, or in the upper stomach, sometimes taken for indigestion. Nausea or vomiting that started late in pregnancy, not the morning sickness of the first months. A BP of 140/90 or above on a home machine, checked twice, 5 minutes apart. A kilogram gained in a week. Fewer movements from the baby.
Two other headaches are emergencies at any stage of pregnancy: a sudden, worst-ever headache that peaks within a minute, and a headache with weakness on one side, slurred speech, a fit, confusion, or a stiff neck with fever. Call 1122 in Pakistan or 112 in India, or get to the nearest hospital. Our guide to stroke symptoms gives the face, arm and speech checks in full.
A BP machine at home earns its keep from 20 weeks. Learn it first. Our home BP check guide covers cuff size, position and timing.
In brief
- First trimester: headaches are common; rising hormones, tiredness, nausea that stops you eating, and caffeine withdrawal are the usual reasons.
- Second trimester: often the easiest months; a new or worsening headache after 20 weeks is the one to report.
- Third trimester: poor sleep, posture, and pre-eclampsia risk; check BP if a headache will not settle.
- After delivery: pre-eclampsia can still appear in the first 6 weeks; the same warning signs apply.
- Medicines: only what your doctor has approved, including any painkiller, balm or herbal remedy.
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Why pregnancy causes headaches
Hormones and blood volume
In the first 12 weeks, oestrogen and progesterone climb steeply and blood volume starts its rise towards about one and a half times normal, so vessels widen and the head feels it. These fade by the second trimester. Most women with migraine improve then too.
Caffeine withdrawal
Many women stop chai and coffee overnight on finding out they are pregnant, and the withdrawal headache arrives within a day or two and lasts up to a week. It need not. Pregnancy caffeine advice is a limit, not a ban: up to 200 mg a day, roughly two cups of ordinary doodh patti or one mug of instant coffee, and cutting down gradually over a week avoids the headache altogether. Our chai and coffee caffeine maths gives the per-cup figures.
Hunger and low blood sugar
Nausea and long gaps between meals drop blood sugar. Late morning, late afternoon, lifts after food: that is this one.
Sleep and posture
Later in pregnancy, sleep breaks up for bathroom trips, heartburn and the search for a position, and both the lost sleep and the stiff neck from propping yourself up on pillows feed tension-type headaches. Sleep matters. Our pregnancy sleeping position guide covers the pillow setup by trimester.
Blocked nose
Pregnancy rhinitis, a stuffy nose from swollen nasal lining, affects many women and gives a heavy forehead pressure. It is not sinusitis unless there is coloured discharge and fever. Steam and saline help; no decongestant tablets or sprays without asking the doctor.
Eyes
Fluid changes shift the glasses number slightly. A new after-screen headache is worth an eye check; it usually settles after delivery.
Comfort measures that are safe at every stage
No permission needed for any of these. They cost nothing.
- Drink a full glass of water (250 ml) the moment a headache starts, then aim for 2 to 2.5 litres across the day, more in summer. Pale urine is the check.
- Eat something within 15 minutes: a slice of bread with peanut butter, a banana, a handful of roasted chana, a katori of dahi. Then keep to small meals every 3 hours.
- Lie down on your left side in a dark, quiet room for 20 to 30 minutes. A cool damp cloth on the forehead or a warm cloth on the back of the neck, whichever feels better.
- Loosen the neck: sit tall, drop the right ear towards the right shoulder for 20 seconds, then the left, then slowly turn the chin to each shoulder. Repeat three times.
- If you dropped caffeine suddenly, have half a cup of chai. It is within the limit and the withdrawal headache lifts within an hour.
- Have someone press gently on the back of the neck and shoulders for 5 minutes. Avoid deep pressure on the belly, lower back or the web between thumb and finger, a point tradition links with contractions.
- Write it down: time, what you had eaten, sleep the night before, and your BP if you have a machine. Take the notes to your next visit.
No painkiller in pregnancy without your doctor’s say-so, including the ones you took freely before, because several common tablets are not advised in the second half of pregnancy and the safe choice depends on your week and your history. The same goes for strong balms and rubs (many contain camphor or high menthol), essential oils, herbal teas sold for headache, and any hakeem’s compound. Never take a friend’s blood pressure or migraine medicine. If a headache is bad enough that you want a tablet, that is a good moment to ring the clinic and check your BP rather than to guess.
How to tell a normal headache from a pre-eclampsia headache
An ordinary pregnancy headache improves with the steps above within an hour or two, comes and goes, and leaves you well in between, whereas a pre-eclampsia headache ignores water, food and rest, sits heavy and persistent across the front of the head, and usually brings at least one companion: swelling, vision changes, upper-stomach pain or a raised BP reading. Timing matters too. Week 8 with morning sickness is almost never pre-eclampsia. Week 32 with puffy hands is a BP check today.
Do not wait to see if it settles. Pre-eclampsia can progress over hours, and it is straightforward to manage when it is caught early, which is the whole point of knowing the signs. No machine at home? Any pharmacy, clinic or lady health worker can take your BP.
Desi homes treat a pregnant woman’s headache with a head massage in warm oil, a cool cloth, sabz chai, rest and shade, and all of those are gentle and fine. The older habit of tying a tight cloth (patti) around the head and giving strong balms is not helpful, and “garmi” explanations can delay a BP check that would have shown the real cause. Tradition is right about rest and hydration, and wrong when it says a headache in the last months is just the baby’s weight.
Migraine in pregnancy
If you had migraine before, tell your doctor at the first visit. Many women improve from the second trimester as hormone levels steady. The plan during pregnancy leans on triggers: regular meals, regular sleep, water, avoiding your known food triggers, and a dark room at the first warning. Some migraine medicines are not used in pregnancy, so the tablets you kept in your bag need reviewing with the doctor, not stopped or continued on your own. A migraine that changes character, or a first-ever aura after 20 weeks, needs a doctor’s review, because aura and pre-eclampsia can look alike and need different care. The Desi Remedies hub has more on everyday headaches for the rest of the family.
After delivery
Headaches in the first two weeks after birth are common, from broken sleep, feeding and the neck tension of holding a baby for hours, and for women who had an epidural or spinal there is occasionally a headache that is worse sitting up and better lying flat, which the hospital needs to hear about. Ring them. Pre-eclampsia can appear for the first time after delivery, so the same rule holds for 6 weeks: a headache with swelling, vision changes, upper-stomach pain or a BP of 140/90 or more is a same-day call.
Your questions about headache in pregnancy
Is it normal to have headaches in early pregnancy?
Yes. Hormone changes, tiredness, nausea and caffeine withdrawal make them common in the first 12 weeks, and they usually ease by the second trimester. Water, small regular meals and rest come first.
When is a headache in pregnancy an emergency?
After 20 weeks, a headache with swelling, vision changes, pain under the right ribs or a BP of 140/90 or higher means the doctor today. At any stage, a sudden worst-ever headache, weakness, speech trouble, a fit or fever with a stiff neck means emergency care now.
What can I take for a headache while pregnant?
Only what your doctor has approved. Some common painkillers are not advised in pregnancy, especially later on. Start with water, food, rest and a cool cloth, and phone the clinic if you feel you need a tablet.
Does pre-eclampsia headache feel different?
It is persistent, throbbing, across the front of the head, and does not lift with water, food or rest. It rarely comes alone; swelling, blurred or flashing vision, upper-stomach pain or a raised BP reading usually come with it.
Can I drink chai for a headache during pregnancy?
Yes, within the 200 mg daily caffeine limit, about two cups of ordinary chai. If you stopped caffeine suddenly, half a cup often ends the withdrawal headache.
Is balm safe on the forehead in pregnancy?
Ask your doctor first. Many strong balms contain camphor or high menthol, and pregnancy guidance is cautious about both. A cool damp cloth does much the same job.
What blood pressure is too high in pregnancy?
140/90 or higher, measured properly and repeated after 5 minutes, needs a call to your doctor the same day. 160/110 or higher needs urgent care.
Can migraine get worse during pregnancy?
Most women improve after the first trimester, but some get worse, particularly early on. Review your migraine medicines with your doctor at the first visit rather than continuing or stopping them yourself.
Can headaches continue after delivery?
Yes, from broken sleep and feeding posture. Pre-eclampsia can still begin in the 6 weeks after birth, so a headache with swelling, vision changes or a high BP reading gets the same same-day rule.