Last reviewed on 12 September 2026.
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This page covers what counts as low, what might cause it, the habits that help, and the signs that need a doctor. If your concern is high blood pressure, the high blood pressure diet chart is the page you want, and its salt advice should not be carried over here, or the other way round.
What blood pressure is considered low?
A reading below about 90/60 mmHg is generally called low blood pressure, or hypotension. The first number is the pressure as the heart pumps, the second as it relaxes between beats. Many healthy people, especially young, slim and physically active ones, run at these levels all their lives without symptoms, and for them it is not a problem. Low blood pressure matters when it causes dizziness, light-headedness, blurred vision, fatigue, nausea or fainting, or when it falls suddenly from a person's usual level.
What causes low blood pressure?
The causes range from harmless to serious, which is why symptoms deserve a doctor's attention. Common ones are dehydration from heat, vomiting or diarrhoea, and medicines, including tablets for high blood pressure, water pills, some antidepressants and drugs for prostate problems. Blood pressure naturally falls during the first half of pregnancy. Less common but more serious causes include heart problems such as a very slow heart rate or valve disease, hormonal conditions affecting the adrenal or thyroid glands, blood loss, severe infection and serious allergic reactions. Food helps with some of these and is irrelevant to others.
Does salt raise low blood pressure?
Salt can raise blood pressure, but extra salt is something to add only if your doctor advises it. For some types of low blood pressure, particularly the kind that drops on standing, doctors do recommend more salt and fluid as part of treatment. For anyone with heart failure, kidney disease, swelling in the legs or high readings at other times, extra salt can be harmful. Some older adults have low pressure on standing and high pressure lying down at the same time. Salt tablets, or heaped spoons of salt on food taken without advice, are a bad idea.
How much water should you drink with low blood pressure?
Enough that you rarely feel thirsty and your urine stays pale, which for many adults means two litres or more a day, and more in hot weather. Dehydration shrinks blood volume and is one of the commonest reasons for a reading to drop. Some doctors advise drinking a couple of glasses of water fairly quickly before getting up in the morning or before a long spell of standing, which can lift pressure for a while. If you have been told to restrict fluids for your heart or kidneys, that instruction overrides everything here.
Is nimbu paani good for low blood pressure?
Nimbu paani with a pinch of salt is a sensible drink on a hot day for someone prone to low pressure, because it replaces fluid with a little sodium and tastes good enough to drink in quantity. It is not a treatment, and the pinch should stay a pinch. When heavy sweating, diarrhoea or vomiting has caused the dip, ORS is the better choice, because its salt and sugar are measured for absorption. Coconut water also helps with fluid and potassium, though it carries less sodium; the page on coconut water benefits explains the difference.
Why do you feel dizzy after eating?
Because blood pressure can fall after a meal, especially a large one heavy in carbohydrate. Digestion diverts blood towards the gut, and in some people, mainly older adults and those with diabetes or Parkinson's disease, the body does not compensate quickly enough. This is called postprandial hypotension. Smaller, more frequent meals, with less refined starch and sugar and more protein and vegetables, help. So does sitting down for a while after eating, and keeping alcohol away from meals.
Does coffee help low blood pressure?
It can raise blood pressure for a short while, but it is not a reliable fix. Caffeine gives a temporary rise that is most noticeable in people who rarely drink it; regular drinkers become partly used to it. A morning cup, or one with a meal, helps some people with low readings feel steadier, but several cups a day add little and can disturb sleep. The page on whether coffee is good or bad for you covers sensible amounts.
Should you avoid alcohol with low blood pressure?
Yes, or keep it very limited. Alcohol widens blood vessels and increases fluid loss through the kidneys, both of which lower blood pressure, and the effect is strongest on an empty stomach or in hot weather. Alcohol, heat, dehydration and long periods of standing are a familiar combination behind fainting at weddings and parties. If you drink at all, have water alongside, eat first, and sit down as soon as you start to feel light-headed.
Can anaemia cause low blood pressure symptoms?
Yes, anaemia causes symptoms that overlap with low blood pressure, such as tiredness, dizziness, breathlessness and a racing heart, and the two are often confused. A shortage of vitamin B12, folate or iron can leave the body unable to make enough red blood cells, which is listed among the causes of low blood pressure, and long-standing B12 deficiency can also damage the nerves that steady blood pressure on standing. A blood test sorts this out quickly. Where anaemia is found, the anaemia diet chart covers iron, B12 and folate foods, and vegetarians in particular need a reliable source of B12.
What should you eat for low blood pressure?
Regular, balanced meals every three to four hours, rather than long gaps followed by a large plate. Build them around moderate portions of whole grains, dal, eggs, fish, chicken or paneer, vegetables and fruit, and include foods that supply B12, folate and iron: milk and curd, eggs, green leafy vegetables and pulses. Salt should be ordinary household salt unless the doctor says otherwise. Keep roasted chana, a banana or some nuts handy for days when a meal is delayed, and carry water in the heat.
Steadying things through the day
None of this treats a cause. It is the ordinary routine that stops a low reading turning into a dizzy morning.
Eat every three to four hours
Regular balanced meals instead of long gaps followed by a large plate: whole grains, dal, eggs, fish, chicken or paneer, vegetables and fruit.
Keep the plate smaller and less starchy
A large carbohydrate-heavy meal is the one most likely to drop pressure afterwards, so lean on protein and vegetables and ease off refined starch.
Drink enough to keep urine pale
For many adults that means two litres or more a day, and more in hot weather. Any fluid limit set for your heart or kidneys overrides this entirely.
Carry something for a delayed meal
Roasted chana, a banana or a few nuts, and water in the heat. A missed meal is a common way to end up light-headed.
Keep alcohol small, or leave it
It widens blood vessels and increases fluid loss through the kidneys, and it works hardest on an empty stomach or in hot weather.
How can you stop feeling dizzy when you stand up?
Stand up in stages: sit on the edge of the bed for a minute, then rise while holding on to something. A drop on standing, called orthostatic hypotension, is defined as a fall of at least 20 mmHg in the top number or 10 mmHg in the bottom number within three minutes of getting up. Crossing the legs and tensing the thigh and buttock muscles can push blood back towards the head when you feel it coming on. Doctors sometimes add compression stockings. Lying and standing readings from a home monitor, written down, are useful to take along.
Does liquorice raise blood pressure?
It does, but it is not a safe home remedy. Liquorice root, known as mulethi, contains glycyrrhizin, which makes the body hold on to sodium and lose potassium, and in large or regular amounts it can raise blood pressure while dangerously lowering potassium. Case reports have linked heavy use to muscle weakness and heart rhythm problems. An occasional cough remedy containing mulethi is not a concern; daily use to push pressure up is.
When is low blood pressure an emergency?
Call for help or go to hospital if low blood pressure comes with fainting, chest pain, confusion, breathlessness, cold and clammy or bluish skin, a very fast or very slow pulse, black or bloody stools, or vomiting blood. These can mean internal bleeding, a heart problem, a severe infection or shock, and no drink or snack will put them right. Frequent dizziness, a fall, or a new drop after starting a medicine is less urgent but still needs a doctor soon. Do not stop or change any blood pressure medicine on your own.
Where heart and circulation nutrition fits
The salt question alone shows how a general blood pressure rule can go wrong for the wrong person. NNWA's Cardiovascular (CVD) Nutrition course runs for five weeks at intermediate level through cardiovascular physiology and risk, blood pressure and sodium, cholesterol and blood lipids, heart-protective eating patterns, nutrition in cardiac conditions, and counselling and behaviour change. It costs 9,999 rupees instead of 14,999, with EMI of 1,667 rupees a month, and learners earn NNWA certificates.
Low blood pressure in brief
Low blood pressure below about 90/60 mmHg is harmless for many people and a warning sign for others, so symptoms need a doctor to find the cause. Diet helps through steady fluids, small regular meals, less alcohol, attention to anaemia and, only when advised, a little more salt. Coffee gives a short lift, and nimbu paani or ORS helps in the heat. Keep high blood pressure advice separate, stand up slowly, and treat fainting, chest pain or black stools as an emergency.