How common is irritability in hypoglycaemia?

When blood glucose falls, the body releases hormones that help raise it again. This stress response can make a person feel tense, restless, short-tempered, anxious, or unusually emotional. The brain also relies on glucose, so low levels may affect concentration, judgement, speech, and coordination. Irritability may appear alongside shakiness, sweating, hunger, dizziness, weakness, a fast heartbeat, blurred vision, or headache. Symptoms can vary from one episode to another, and irritability alone cannot identify the cause. Similar feelings may follow poor sleep, stress, pain, medication effects, or other health problems.

For someone who uses insulin or another glucose-lowering medicine, a glucose reading taken during symptoms can help show whether low blood glucose is involved. A clinician can help interpret readings and review patterns, especially when episodes happen after missed meals, physical activity, alcohol, or a change in treatment.

If low blood glucose is suspected and the person is awake and able to swallow, follow their personal diabetes plan for treating it. This commonly involves taking a fast-acting source of glucose, then checking again according to the plan and eating a longer-lasting carbohydrate if advised. Sit down, avoid driving, and tell someone nearby what is happening. Do not give food or drink to a person who is drowsy, having a seizure, or unable to swallow. Keep a record of the time, symptoms, glucose reading if available, food, activity, alcohol, and medicines; this can help the care team find a pattern.

Get urgent medical help if confusion, unusual behaviour, trouble speaking, loss of coordination, a seizure, fainting, or reduced responsiveness does not improve promptly, or if the person cannot safely swallow. Emergency services should be contacted for severe symptoms or when the prescribed emergency treatment is unavailable or does not work. Arrange medical review for repeated episodes, symptoms without a clear explanation, or a low reading in someone who does not use glucose-lowering treatment. Do not change diabetes medicines without professional advice.

Ask: Could my irritability be related to low blood glucose or to another cause? What symptoms should prompt me to check my glucose? What treatment should I keep with me, and when should someone call emergency services? Could my medicines, meals, exercise, or alcohol be contributing? Should my treatment plan or glucose targets be reviewed?