Understanding Knee Pain: What Types of Knee Pain Require You to See a Doctor?

Knee pain isn’t a condition limited to the elderly. This problem can affect people of all genders and ages, potentially impacting daily life and activities.
The main causes of knee pain can be divided into 4 major groups: injuries from accidents or sports activities, conditions affecting areas outside the knee joint, joint degeneration from long-term use such as knee osteoarthritis, and deterioration of organs surrounding the knee joint.
If you experience knee pain even during rest, severe pain during movement or weight-bearing activities, or noticeable knee swelling, these are warning signs indicating you should see a doctor.

Table of Contents

What does knee pain feel like?

Knee pain refers to symptoms involving aching, pain, stiffness, tingling, feelings of instability, or weakness in the knee joint. These sensations can occur in the front of the knee, behind the knee, as well as on the sides of the knee. Sometimes, you may experience radiating pain up to the thigh or down to the calf area, which are common accompanying symptoms of knee pain.

Understanding the 4 types of knee pain

Knee pain type 1

This type occurs from accidents or sports injuries, where damage happens to organs or structures within the knee joint cavity. This leads to knee pain from various causes such as damaged joint cartilage, torn anterior cruciate ligament, torn posterior cruciate ligament, or torn meniscus in the knee.

Knee pain type 2

This type involves conditions affecting organs outside the knee joint, caused by acute overuse injuries or sports activities. These result in sprains or strains of the inner and outer knee ligaments. Common conditions frequently seen in runners are lateral knee pain known as IT band syndrome (Iliotibial band syndrome), hamstring muscle strains, or inflammatory injuries to the patellar tendon.

Knee pain type 3

This type of knee pain develops from degeneration or continuous long-term use of the knee joint, causing abnormalities in organs or structures within the knee joint. This primarily refers to osteoarthritis in the knee (OA Knee), which was traditionally common in the elderly. However, this condition is currently found in younger people, from around the age of 45 onwards. Due to lifestyle changes that reduce physical activity, obesity, or overweight conditions, these factors cause premature knee degeneration. Additionally, arthritis knee can also result from patellar tendonitis or torn meniscus from overuse.

Knee pain type 4

This involves long-term degenerative conditions affecting organs outside the joint, such as chronic quadriceps muscle inflammation or quadriceps muscle weakness. This group typically affects the elderly because aging causes muscles, bones, and nerves to deteriorate and function less efficiently.

Common symptoms of knee pain

If you experience knee pain, you should observe the specific symptoms to gain basic understanding which also provide important information for disease diagnosis. Knee pain can be categorized into several patterns:

Knee pain during movements and activities

This pattern of pain occurs when moving or bearing weight in certain positions, specifically during mobilities. It’s not constant pain throughout the day. When sitting or lying down, there are no symptoms. This pattern of knee pain indicates abnormalities in certain knee structures that are engaged or bear weight only during movement.

Stiff knee pain when starting to move

This pattern of pain occurs specifically when beginning to move, but gradually subsides after some activities. For example, it takes place after waking up in the morning. The first steps when getting up to walk cause severe knee pain, but the pain decreases after moving around for a while. Or it happens during midday after sitting and working for extended periods. Standing up causes severe knee pain, but it lessens after walking about 5-10 steps.

This pattern indicates knee inflammation that isn’t severe yet. When we don’t move the knee joint for extended periods, inflammation accumulates in the affected area. The moment we make the first moves, it’s like stimulating inflammation in the knee to increase. After using it for a while, as blood circulation improves in the knee area, the inflammation disperses and the pain reduces.

Constant knee pain

This pattern of knee pain persists even when resting in bed or sitting still, indicating more severe inflammation with a considerable amount of inflammatory substances accumulated in the knee joint. This severe inflammation is often accompanied by swelling, redness, and warmth in the knee. You can easily observe these symptoms yourself by placing your hands on both knees. The inflamed knee will feel noticeably warmer or hotter than the normal knee.

Knee pain at specific points only when being pressed

This pattern is called localized pathology that hurts only when pressed at specific points. One example is injury or inflammatory strain of the IT Band, which is a tendon on the outer side of the knee that works hard during running. It hurts only when pressed directly, but there’s minimal or no pain during general activities like sitting, standing, walking, or lying down.

Basic self-care when having knee pain

Rest and reduce activities

Since the knee is an organ used for moving, standing, walking, and weight-bearing, increased use leads to greater chances of inflammation. Therefore, resting and reducing movement is important for alleviating knee pain. You can still perform daily activities normally, but should reduce knee activities from your usual routine such as excessive standing, walking, or climbing stairs.

Elevate your leg

Whether sitting or lying down, elevate your leg higher. When sitting, prop your leg up on a chair. When lying down, use pillows or blankets to support and raise your feet higher than your torso. If your leg remains in a low position, blood will pool in the inflamed knee area and that significantly increases pain symptoms.

Cold and hot compress therapy

For acute inflammation within the first 24 hours, cold compress therapy is recommended to help stop blood flow to the knee area. This prevents increased blood circulation and additional inflammatory substance accumulation. After the first 24 hours or for chronic inflammation, hot compress therapy is recommended as it helps increase blood circulation to nourish the knee area as well as clearing away inflammatory substances.

What types of knee pain require you to see a doctor?

If you have severe and obvious knee pain, you may try self-assessing your pain scale initially. Rate from 0 (no pain at all) to 10 (imagine the worst pain you’ve ever experienced). If your self-assessed pain scale exceeds 5 points, this is considered abnormal pain requiring medical consultation.

Pain that occurs even during rest or inactivity

If your knee hurts at night or even when you’re completely still, this indicates a considerable amount of inflammation accumulated in the knee area which represents a fairly severe condition.

Severe knee pain during moving, bending, extending, or weight-bearing

This type of pain makes movement difficult or impossible altogether. Simply put, the pain is so severe that you can’t bend your knee or bear weight when standing. This represents abnormal pain levels.

Significant knee swelling

This symptom indicates considerable abnormalities within the knee joint. You can observe this yourself by trying to fully extend both legs straight. In a normal condition, you should see natural dimples over the knee joints. However, if a knee has swelling, fluid accumulation inside the joint will cause bulging, making the natural knee dimples invisible compared to the normal side.

Knee pain combined with other abnormal symptoms

Knee pain accompanied by other abnormal symptoms includes:

Bruising or discoloration around the knee area, whether in front, on the sides of, or behind. This indicates possible bleeding in knee organs or surrounding knee tissues.
Inability to fully bend or extend the knee, without pain. This pattern may indicate something is mechanically blocking the joint, which requires additional diagnosis.
Fever or body heat. If these symptoms accompany knee pain, it is possible that infection occurs within the knee joint and requires immediate medical attention.

Knee pain can actually be categorized into many different causes and conditions, each requiring different treatment approaches. Therefore, to maintain healthy knees for the long term, the best and safest approach is seeing a doctor for proper diagnosis. It is especially recommended for cases with fairly severe symptoms where initial self-care may not provide adequate improvement.

Q&A

Knee pain during movement and activities, occurring when moving or bearing weight in certain positions. The pain is not constant throughout the day, taking place only when moving. When sitting or lying down quietly, there are no symptoms.
Stiff knee pain when starting to move, but gradually subsides after some activities. For example, it takes place after waking up in the morning. The first steps when getting up to walk cause severe knee pain, but the pain decreases after moving around for a while.
Constant knee pain even when resting in bed or sitting still. This indicates more severe inflammation, often accompanied by swelling, redness, and warmth in the knee joint.

Pain that occurs even without body movement, which represents a fairly severe condition.
Severe pain during moving, bending, extending the knee, or weight-bearing. This type of pain makes movement difficult or impossible altogether.

Significant knee swelling, indicating considerable abnormalities within the knee joint. You can observe this yourself by trying to fully extend both legs straight to see the natural dimples in front of the knee joints.

Consult symptoms before scheduling an appointment.