Fatigue is a feeling of tiredness or low energy that can interfere with usual activities. If your energy has changed without a clear reason, a health care provider can help assess what may be contributing to it.
Describe the pattern and its effect on daily life
Before your appointment, note when the fatigue began and how it has changed. For example, is it there when you wake up, does it build later in the day, or does it come and go? You can also note whether the change feels steady or whether some days are easier than others.
Describe what has become harder in practical terms. Which usual tasks take more effort, do you need to stop partway through, or have you postponed something you normally do? A specific example from work, home, or another part of your routine can help your provider understand the effect. Include activities that remain manageable too, so the conversation covers what you can still do as well as what has changed.
A brief diary may help you notice when your energy is higher or lower. Write down the time of day and a short note about how you feel or what you were doing. You do not need a detailed record. If keeping notes feels like extra work, use a few examples you remember instead. You can also mention changes in your routine or health that you have noticed, without deciding whether they caused the fatigue.
What an assessment may involve
Your provider may ask about sleep, daily activities, appetite, and exercise. They may also do a physical exam and consider lab tests. Fatigue has many possible causes, so a checklist or one detail cannot identify the cause on its own. Your provider can use your account and the exam to decide what questions or tests may be useful.
Bring your notes, if you made them, and a list of the medicines you take. If you are unsure whether a detail is relevant, raise it and let your provider decide whether it matters.
If you think a medicine may be affecting your energy, tell your provider and ask what to do. Do not stop or change a medicine without speaking with them first. You can ask what the next step would be if the assessment does not explain the fatigue, and when to get back in touch if your symptoms change.
When to seek care
Contact a health care provider about fatigue that is unexplained or persistent. You do not need to wait a set number of weeks before asking for advice.
Contact your provider right away if fatigue comes with dizziness, blurred vision, little or no urine, or recent swelling and weight gain.
Call 911 in the United States for emergency warning signs such as difficulty breathing, new confusion, fainting, or chest pain or discomfort lasting two minutes or more. Sudden dizziness, weakness, or a change in vision can also be an emergency. Do not wait for a routine appointment when these symptoms occur.