As a rule of thumb, it is time to go to the doctor when a symptom is severe, keeps getting worse, lasts longer than you would expect, keeps coming back, or is new and unexplained. The same applies when something stops you doing ordinary things or simply worries you. Many minor illnesses settle on their own or with advice from a pharmacist, while a small number of symptoms need emergency care immediately. Knowing which group a problem falls into saves time and anxiety.
Three questions to ask yourself
- How long has it lasted? A cold that clears within a week or so is normal. A cough, tiredness or pain that hangs on for several weeks is not.
- Is it getting better or worse? Improvement, even slow, is reassuring. Steady worsening is a reason to book.
- Is it new or different for you? A headache like your usual ones is different from the worst headache you have ever had or one that comes with new symptoms.
Signs that usually mean booking an appointment
- A cough, hoarse voice or sore throat that lasts for weeks.
- Unexplained weight loss, or a loss of appetite that does not recover.
- A lump or swelling anywhere in the body, especially one that is growing.
- A mole that changes in size, shape or colour, bleeds or itches.
- Blood in urine, stools or anything you cough up.
- A lasting change in bowel habits.
- Persistent tiredness that rest does not fix.
- Night sweats that soak your sheets; our article on feeling hot at night covers the difference from simply being too warm.
- Pain that disturbs sleep, keeps returning or needs regular painkillers.
- Low mood, anxiety or stress that affects work, relationships or sleep for more than a couple of weeks.
- Side effects from a medicine, or wondering whether you still need it.
Physical sensations such as a racing heart or tight chest are sometimes caused by anxiety, but they should be assessed first. Our guide on physical symptoms of anxiety explains why.
When a pharmacist or nurse line may be enough
Pharmacists can advise on many everyday problems and tell you when a doctor is needed. Common examples include colds, mild sore throats, minor skin rashes, hay fever, minor burns and bites, and questions about over-the-counter medicines. Many health systems also have telephone or online advice lines staffed by nurses who can help you decide where to go. If you are unsure, these services are a sensible first call.
Red flags: seek emergency help now
Do not wait for an appointment if you or someone with you has any of the following. Call your local emergency number:
| Symptom | Why it is urgent |
|---|---|
| Chest pain, pressure or tightness, especially spreading to the arm, jaw, neck or back | May signal a heart attack |
| Face drooping, arm weakness or slurred speech | May signal a stroke |
| Severe difficulty breathing | The body may not be getting enough oxygen |
| A sudden, severe headache unlike any before | May point to bleeding in the brain |
| Heavy bleeding that will not stop | Risk of serious blood loss |
| Confusion, fainting or a seizure | Several serious causes are possible |
| Signs of a severe allergic reaction, such as swelling of the lips or throat | The airway can close quickly |
| Thoughts of harming yourself and feeling unable to stay safe | Immediate support is needed |
Reasons people put off seeing a doctor
Common reasons include not wanting to waste anyone's time, worry about what might be found, embarrassment about the body part involved, cost or difficulty getting time off. These are understandable, but they can mean problems are found later than necessary. Doctors deal with intimate or awkward symptoms every day, and many conditions are simpler to treat when caught early. If cost or access is a barrier, ask about community clinics, telehealth options or advice lines where you live.
Making the appointment count
Once you have decided to go, a little preparation goes a long way. Note when the symptom started, what makes it better or worse, what you have tried and any medicines you take. Bring your top questions, written down. The guide on how to prepare for a doctor's appointment walks through it.
Do not skip routine check-ups
Some health problems cause no symptoms at all in the early stages. High blood pressure is a well-known example. Routine check-ups and age-appropriate screenings are how these are found. If it has been a while since your last one, read what to expect at an annual physical and consider booking even if you feel well.
Quick answers
Is it a waste of the doctor's time if it turns out to be nothing?
No. Ruling out a serious cause is a legitimate reason for an appointment, and reassurance has real value.
Should I see a doctor for a fever?
Most short fevers with a cold or flu settle at home. Seek advice if a fever is very high, lasts more than a few days, comes with a rash, stiff neck, confusion or breathing difficulty, or affects a baby, an older person or someone with a weakened immune system.
