Heart palpitations when hungry: what to know

When energy intake is delayed, the body can release stress hormones that cause shaking, sweating, hunger, light-headedness and a fast or forceful heartbeat. Hypoglycaemia is more likely in people using insulin or certain diabetes medicines, but similar sensations can occur after strenuous activity, alcohol or a long gap between meals. Caffeine and anxiety may intensify awareness. Anaemia, thyroid disease and an abnormal rhythm such as atrial fibrillation can cause palpitations at other times too.

Sit somewhere safe and, if you are awake and able to swallow, have a balanced snack containing carbohydrate and protein. Drink water and avoid driving until symptoms have settled. If you have diabetes, follow your personalised low-glucose plan and check your glucose as advised. Note the time since your last meal, activity, medicines and associated symptoms. Arrange a review if episodes recur, happen despite regular meals or begin after a medicine change.

Get emergency help for palpitations with chest pain, severe breathing difficulty, fainting, seizure, severe confusion or inability to swallow safely. Seek prompt advice for recurrent episodes, especially with diabetes, pregnancy or heart disease. Do not give food or drink to someone who is drowsy or unconscious.

Ask whether your medicines, meal timing or glucose levels could explain the episodes, and whether blood tests or an ECG are appropriate. Discuss a practical meal and symptom plan for work, exercise and travel.