Heart racing when trying to sleep

When you lie quietly, the heartbeat is easier to feel through the chest or neck. Worry about sleep, a late stimulant drink, nicotine, a heavy meal, fever, or an uncomfortable position may add to the sensation. Generalised Anxiety Disorder may cause physical symptoms as you try to rest. Dehydration, Hypoglycaemia, Anaemia, Iron Deficiency Anaemia, and Hyperthyroidism can also contribute. Atrial Fibrillation may feel irregular, and Heart Failure can cause breathlessness that is worse when lying down.

Notice whether the beats are fast but even, uneven, or interrupted by flutters. That description, along with your medicines and health history, helps a clinician decide whether testing is needed.

Pause the bedtime routine and sit comfortably. Breathe in gently and make the out-breath longer, without forcing deep breaths. Note the time, position, recent drinks, medicines, and symptoms. Avoid caffeine, nicotine, and over-the-counter stimulants near bedtime. If you have lost fluid through heat or illness, take small drinks unless you have been instructed to limit fluids. Arrange medical review if this keeps delaying sleep or begins happening during the day.

Get emergency help for chest pain, severe breathlessness, fainting, collapse, confusion, or major weakness with palpitations. Seek urgent advice when the heartbeat remains fast at rest, feels newly irregular, or episodes come with repeated dizziness. If you might faint, stay seated and ask someone to help rather than driving.

Ask if your symptoms warrant an ECG, blood tests for anaemia or thyroid changes, or a wearable monitor. Explain how sleep, meals, caffeine, stress, and body position affect the episodes.