What is happening in your knee when new pain arrives and what to do first
Nicola Tik
Knee pain that has come on recently can feel unsettling, particularly when it affects something as fundamental as walking, going up stairs, or simply getting up from a seat. Most new knee pain is the body responding to irritation or increased load in the area rather than a sign of serious damage. This article explains what is likely going on and what you can do in the first few days to help things settle.
The knee is the largest joint in the body. It sits between the thigh bone and the shin bone, with a small bone called the kneecap sitting at the front. These bones are connected by ligaments, cushioned by two pieces of cartilage called the menisci, and surrounded by a network of tendons and muscles that control how the joint moves and how much load it absorbs.
Pain can show up in different parts of the knee depending on which structure is most irritated. Some people feel it at the front, particularly around or behind the kneecap. Others notice it on the inner or outer side of the joint, or behind the knee. All of these are common patterns and do not in themselves indicate that something is seriously wrong. Where you feel the pain is useful information, but it is rarely cause for alarm.
The knee manages a significant amount of load across the day. Walking, climbing stairs, sitting down, and standing up all pass force through the joint. When something changes, whether that is an increase in activity, a period of reduced movement followed by a more demanding day, or a sustained position that loads one part of the knee more than usual, the surrounding tissues can become irritated and sensitised.
The muscles around the knee, particularly the large muscles at the front and back of the thigh, play a huge role in absorbing that load. When these muscles are fatigued or have lost some of their tolerance, more of the demand falls directly onto the joint structures, which can contribute to pain developing or persisting.
Keeping gently moving is generally more helpful than complete rest when knee pain is new. Short, regular movement through the day, such as getting up and walking for a few minutes every 30 to 45 minutes, keeps the joint mobile and the surrounding muscles gently engaged without placing heavy demand through the area.
Activities that involve heavy load through the knee, such as running, deep squats, or anything that causes a sharp increase in pain, are worth avoiding for the first few days while things settle. This is a short-term adjustment rather than a long-term restriction.
Applying something cool to the area, such as a cold pack wrapped in a cloth, for 10 to 15 minutes at a time may help reduce any swelling and ease discomfort in the early days. If swelling is not a feature, warmth can be equally helpful for easing muscle tension around the joint.
If over-the-counter pain relief is appropriate for you, taking it as directed and consistently for the first day or two, rather than waiting until pain peaks, can help keep discomfort more manageable. A pharmacist can advise on the best option.
Sitting in a chair with both feet flat on the floor, slowly straighten one leg until it is roughly level with the seat, hold for three to five seconds, then lower it slowly back down. Repeat eight to ten times on each side. This gently engages the thigh muscles without placing significant load through the knee joint itself.
If you would like a guided stretch to support you through this, VIDA has a short video you can follow at your own pace.
When resting, elevating the leg slightly, by resting it on a cushion or footstool, can help reduce any swelling and ease discomfort around the joint. Avoid sitting with the knee bent deeply for long periods, as this can increase pressure behind the kneecap and cause stiffness when you straighten it again.
Most new knee pain begins to ease within a week or two with some simple adjustments. If you notice significant swelling that came on quickly, the knee feels unstable or gives way, or pain is not easing at all after a couple of weeks, it is worth speaking to your GP or a physiotherapist.