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Stop fasting if you develop severe dizziness, feel close to fainting, become confused or unusually weak, start shaking, have blurred vision or nausea, or notice severe thirst or dark urine. Seek emergency help for chest pain, difficulty breathing, a seizure, loss of consciousness, or significant confusion or drowsiness. If you have diabetes, follow your clinician’s plan; the glucose thresholds below are specific to Saudi Ministry of Health Ramadan guidance, not a substitute for personal medical advice.
Stop the fast and assess symptoms promptly
Do not try to push through severe or worrying symptoms. Stop fasting, rest somewhere safe, and seek prompt medical advice if symptoms are significant, persist, or do not improve quickly. Dubai Health Authority’s 2026 Ramadan guidance advises stopping immediately for symptoms that may signal dehydration, low blood sugar, or extreme fatigue; its warning list appears in guidance about exercise while fasting, so it is not a universal diagnostic checklist.
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- Severe dizziness, feeling close to fainting, or fainting
- Confusion, marked weakness, shaking, or unusual fatigue
- Blurred vision or nausea
- Severe thirst, very dry mouth, dark urine, or unusually little urination
- Muscle cramps, poor concentration, lethargy, or excessive sleepiness
- Unusual palpitations
Dehydration can cause symptoms ranging from thirst and dry mouth to confusion or fainting. The Saudi Ministry of Health’s Ramadan fasting and dehydration guidance identifies children, older adults, people with diabetes or kidney disease, pregnant or breastfeeding people, and people exercising in the sun as higher-risk groups. Fever, vomiting, diarrhea, increased urination, and taking diuretics can also increase dehydration risk.
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Call your local emergency number if someone has any of the following:
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- Difficulty breathing or chest pain or pressure
- Loss of consciousness or a seizure
- Significant new confusion or drowsiness
- Fainting with chest discomfort, an abnormal heartbeat, speech or vision problems, limb weakness, an injury, or delayed recovery to normal alertness
Do not use Singapore’s emergency number unless you are in Singapore; the Singapore Ministry of Health’s emergency advice gives country-specific instructions. For fainting warning signs, see MedlinePlus’s guidance on fainting.
If you have diabetes, use your own fasting plan
Low or high blood sugar can be dangerous, and symptoms may overlap with dehydration or other illness. The Saudi Ministry of Health’s Ramadan guidance on high and low blood sugar recommends breaking the fast in these circumstances:
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- Blood glucose below 70 mg/dL
- A recheck within an hour that is 70–90 mg/dL
- Blood glucose above 300 mg/dL
- Symptoms of high or low blood sugar, dehydration, or acute illness
These are that ministry’s Ramadan recommendations, not individualized instructions for every person with diabetes. Follow the plan agreed with your clinician, including any different thresholds or monitoring instructions.
What to do if low blood sugar is suspected
If the person is conscious and can swallow safely, Mayo Clinic advises about 15 grams of fast-acting carbohydrate, then a blood-glucose recheck after 15 minutes. Glucose tablets are one option; follow the person’s prescribed plan where available. The Mayo Clinic hypoglycemia treatment guidance cautions not to give food or drink by mouth to someone who has fainted or cannot swallow safely. Call emergency services if severe hypoglycemia is suspected or the person is unconscious.
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For further symptom information, the NHS explains low blood sugar (hypoglycaemia). Symptoms alone cannot establish the cause; urgent or worsening symptoms need medical assessment.
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