When to See a Doctor for Knee Pain: Can Knee Pain Be Caused by Arthritis or an Injury? Why Does My Knee Hurt When I Walk or Climb Stairs?

The short answer is yes: knee pain may arise from arthritis, an injury, or overuse, and these categories can overlap. A person with gradual stiffness may have a different story from someone whose knee hurt immediately after a pivot or fall. Yet symptoms are not a home test for a torn structure or arthritis. Official NHS guidance lists sprains and strains, tendon problems, ligament, tendon or meniscus injuries, osteoarthritis, bursitis, gout, and joint infection among possible explanations for knee symptoms [1]. The first task is therefore to describe the pattern clearly, not to attach a label too early.

Think about timing as well as intensity. Did the pain start during one identifiable event, build through repeated stairs at an MTR station, or appear after an increase in running, hiking, kneeling, or standing work? Is it present only while bending, or does it wake you at night? Does a rest day change it? These questions turn a vague complaint into useful information for a clinician. For a broader introduction to patterns and possible contributors, see knee pain causes; it should complement, not replace, an examination.

Walking and stairs are useful observations because they ask the knee to bend, support body weight, and control movement. Going downstairs may feel different from going up; a shallow chair may feel different from a firm one. Pain during these tasks does not tell you on its own whether the cause is arthritis or injury. It does show which everyday function is affected. Describe the task in plain terms: for example, pain on the first few steps after sitting, pain only after twenty minutes of walking, or pain when the knee bends beyond a certain point.

The best record includes what happened before and after the activity. Note footwear, surface, recent workload, any previous knee problem, and whether the knee swells later that day. Avoid testing the knee repeatedly by doing the same painful movement. Instead, choose a tolerable amount of activity and observe the result. This is more useful than a single pain score because it gives a clinician a picture of function, change over time, and possible aggravating factors. The related guide to knee pain symptoms can help you organise what you notice.

Choose the next step by combining the severity, the change in function, and any signs of infection or major trauma. The table below is a way to prepare information, not a triage tool that replaces medical advice. If a knee is visibly deformed, you cannot move it or take weight through it, swelling is pronounced, or it is hot and red with fever, chills, or feeling unwell, seek urgent medical care. These signs can require prompt assessment because the cause may need treatment beyond simple rest [1].

If there was no major injury and there are no urgent warning signs, a short period of cautious activity adjustment may be reasonable. NHS advice includes reducing weight through the knee, avoiding long periods of standing, and using a wrapped ice pack for up to 20 minutes at a time; it advises medical review if knee pain has not improved within a few weeks [1]. In Hong Kong, arrange a medical assessment sooner if pain is worsening, repeatedly interrupts work or sleep, or is changing how you walk. A clinician can decide whether examination, rehabilitation, imaging, or referral is appropriate.