POTS fatigue: why it happens and how to manage it

Postural orthostatic tachycardia syndrome can make ordinary upright activity demanding. Standing may bring a fast heartbeat, lightheadedness, breathlessness, nausea, headache, or difficulty thinking clearly. Repeated symptoms can interrupt sleep, meals, study, work, and exercise, leaving a person drained even after resting.

Fatigue is not specific to POTS. Dehydration, low iron or anaemia, recent COVID-19, coeliac disease, kidney disease, medication effects, low mood, and poor sleep can also contribute. A clinician can review the pattern and decide whether blood tests, a medication review, or an assessment of standing symptoms is needed.

Plan demanding tasks for the time of day when you have more energy, break them into smaller periods, and rest before you are completely depleted. Sit for tasks such as showering or food preparation, avoid very hot environments, and change position slowly. A symptom diary can reveal links with standing, heat, meals, sleep, infection, and stress.

A gradual, individual exercise plan may improve tolerance, often beginning with activities that can be done lying or sitting. Build up only within a clinician-approved plan. Drink regularly and discuss salt, fluids, and compression with a healthcare professional; these measures are not suitable for everyone, including some people with heart or kidney conditions.

Book a review when fatigue is new, steadily worsening, stops you doing usual activities, or comes with weight change, fever, persistent diarrhoea, heavy bleeding, swollen legs, or sleep problems. Seek urgent help for fainting with chest pain, severe breathlessness, confusion, new weakness, or a severe allergic reaction. Sudden exhaustion after heat exposure with confusion or collapse also needs emergency care.

Ask what may be driving your fatigue, whether anaemia, thyroid or nutritional problems should be checked, which activity plan is appropriate, and how to recognise a flare that needs assessment. Bring a list of medicines and a short record of sleep, meals, symptoms, and activity.