Why Does the Inside of My Knee Hurt When I Stand Up?

Pain on the inner, or medial, side of the knee when moving from a seated position to a standing one is a common symptom. This transition from sitting to full weight-bearing places compression and shear forces on the knee joint structures. The pain, which can range from a dull ache to a sharp stab, indicates mechanical stress on the joint’s load-bearing or cushioning components. Understanding the underlying structures is the first step in addressing this discomfort.

Common Conditions Causing Pain

Inner knee pain upon standing is frequently traced back to three primary conditions, aggravated by the sudden increase in vertical load and joint extension. The most prevalent cause is Medial Compartment Osteoarthritis (OA), where the smooth articular cartilage on the ends of the thigh and shin bones wears down. When the knee accepts full body weight, compression forces intensify, leading to painful bone-on-bone friction within the medial compartment. This degenerative process typically causes pain that increases throughout the day and stiffness after periods of inactivity.

Another frequent source of discomfort involves the medial meniscus, the C-shaped fibrocartilage that acts as a shock absorber and stabilizer. In older individuals, simple actions like an awkward twist while getting up can cause a degenerative tear in this tissue. When the knee extends and bears weight, the torn meniscal fragment can be pinched between the femur and tibia. This causes sharp pain or a feeling of catching in the joint, as the load transfer stresses the damaged cushioning material.

The third common culprit is Pes Anserine Bursitis, which involves inflammation of the bursa located two to three inches below the inner knee joint line. This bursa cushions the insertion point of three hamstring tendons—the sartorius, gracilis, and semitendinosus—known as the pes anserinus group. When transitioning to a standing position, the attached hamstring muscles pull on these tendons, creating friction or compression against the inflamed bursa. People with tight hamstrings or underlying knee issues are susceptible to this condition, which registers as tenderness and pain below the joint.

Immediate Self-Care Strategies

For immediate relief from an acute flare-up of medial knee pain, conservative self-care strategies are the first line of defense. The RICE protocol—Rest, Ice, Compression, and Elevation—is effective for managing initial pain and swelling. Apply a cold pack wrapped in a thin towel for 15 to 20 minutes several times a day during the first 48 to 72 hours to reduce inflammation.

Once acute pain subsides, or for chronic stiffness, heat application can be beneficial as it helps relax tight muscles and increase blood flow. Activity modification is also necessary, specifically adjusting how the body moves when standing up. Try using your hands to push off the chair or armrests to reduce the vertical load on the knee joint. Also, avoid twisting or pivoting motions as you rise to minimize shear stress on the medial structures.

Gentle, low-impact exercises help maintain muscle support around the joint without causing further irritation. A simple quadriceps set, where the thigh muscle is tightened while the leg is straight, activates supporting muscles without moving the joint. Similarly, a gentle hamstring stretch, such as lying on your back and lifting the leg toward the chest, can help reduce tension contributing to bursitis. Regular, non-weight-bearing exercises stabilize the knee and are safer than high-impact movements during a painful period.

Recognizing When to See a Doctor

While self-care provides temporary relief, certain “red flag” symptoms and persistent pain warrant a professional medical evaluation. A serious structural injury may be present if the knee pain is accompanied by an inability to bear weight, or if the joint feels like it is locking, buckling, or giving way. Sudden, rapid swelling combined with warmth or redness requires prompt attention, as it could indicate an infection or significant internal trauma.

It is advisable to seek a doctor’s opinion if the pain does not improve within one to two weeks despite consistent rest and self-care. A medical professional can conduct a thorough physical examination, which may involve specific maneuvers to test the integrity of the menisci and ligaments. They may also order imaging tests, such as X-rays to assess for arthritis or fractures, or an MRI to visualize soft tissues.

This initial evaluation accurately diagnoses the source of the medial knee pain and determines the correct next steps. Depending on the findings, the doctor may suggest:

  • Targeted physical therapy.
  • Custom orthotics.
  • Anti-inflammatory medications.
  • A referral to a specialist for advanced treatments like injections or surgical consultation.

Allowing persistent or severe symptoms to go unaddressed can lead to further joint damage and prolonged recovery.