Here are some frequently asked health questions about fasting during the holy month of Ramadan.
These answers have been put together by medical experts and Islamic scholars and researchers.
People with type 1 diabetes shouldn't usually fast, but people with type 2 diabetes on insulin should be able to. Their doctor may advise adjusting the dose of their insulin, or their insulin type may need to be changed.
People with uncontrolled migraines should not fast. But managing your migraines is possible with the right medicine and certain lifestyle changes. Ask your doctor for further advice on controlling your migraines.
People with well-controlled high blood pressure can fast. Your doctor may advise you to change your medicine to help you take tablets outside fasting times. Someone with low blood pressure who is otherwise healthy may fast. They must ensure they drink enough fluid and have enough salt.
No. Someone receiving a blood transfusion is advised not to fast on medical grounds. They may fast on the days when no transfusions are required.
Speak to your doctor for advice on specific medicines.
Taking tablets breaks the fast. But injections, patches, eardrops, and eyedrops don't break the fast as they're not considered to be food and drink – though there are differences of opinion among Muslim scholars on these issues. Islamic law says sick people shouldn't fast.
There's medical evidence to show that fasting in pregnancy isn't a good idea. If a pregnant woman feels strong and healthy enough to fast, especially during the early part of the pregnancy, she may do so.
If she doesn't feel well enough to fast, Islamic law gives her clear permission not to, and to make up the missed fasts later. If she's unable to do this, she must perform fidyah, a method of compensation for a missed act of worship, such as paying for someone to be fed.
No. Islamic law says a breastfeeding mother doesn't have to fast. Missed fasts must be compensated for by fasting at a later date, or fidyah, once breastfeeding has stopped.
Yes. Smoking is bad for your health and Ramadan is a great opportunity to change unhealthy habits, including smoking.
Read more about stopping smoking.
Children are required to fast when they reach puberty. It isn't harmful. Fasting for children under the age of seven or eight isn't advisable. It's a good idea to make children aware of what fasting involves and to practise fasting for a few hours at a time.
Muslim experts have differing opinions on this issue. Some say using an asthma inhaler isn't the same as eating or drinking and is therefore permitted during fasting. In their view, people with asthma can fast and use their inhalers whenever they need to.
But other scholars say the inhaler provides small amounts of liquid medicine to the lungs, so it breaks the fast. They say people with poor control of their asthma mustn't fast until good control is achieved.
Some people with asthma may opt for longer-acting inhalers so they can fast. See your doctor for further advice.
Yes, but don't drink the water. A bath or shower, or swimming, has no effect on the fast. No water should be swallowed during any of these activities, as that would break the fast.
Yes. You could become very dehydrated if you don't drink enough water before the fast. Poor hydration can be made worse by weather conditions and even everyday activities like walking to work or housework.
If you produce very little or no urine, feel disoriented and confused, or faint as a result of dehydration, you must stop fasting and have a drink of water or other fluid.
Islam doesn't require you to make yourself ill when you fast. If a fast is broken, it will need to be compensated for by fasting at a later date.
People on dialysis mustn't fast and should perform fidyah, such as paying for someone to be fed.
Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.