Knee injections Gilbert: how long each one actually lasts

Arthritis and old injuries often cause knee soreness

Arthritis can wear the smooth cartilage that cushions your knee. Old injuries may also leave aching, stiffness, swelling, or catching.

Soreness from arthritis often builds after walking or using stairs. Your knee may also feel stiff after you’ve sat awhile.

A tendon beside the joint can hurt after repeated use. That soreness may sit above, below, or beside your kneecap.

Tell the clinician exactly where it hurts and when soreness began. Those facts help separate joint soreness from nearby tendon soreness.

Easy movement and short rests can settle the knee

First, ease back from the activity that brought on soreness. Don’t stop moving all day, because long rest can add stiffness.

Use a cold pack after activity if your knee swells. Warmth before movement can help stiffness, but it won’t suit everyone.

Supportive shoes won’t fix the cause, but they can lessen strain. If one exercise sharply increases soreness, choose a gentler movement.

Write down which movement hurts and how long soreness lasts. You’ll have clear details to share if you arrange a visit.

Heat, fever, or sudden weakness needs prompt care

Get care today if you run a fever and the knee is hot and swollen. Sudden weakness or a knee stuck bent also needs quick attention.

For slow soreness, a clinician will ask how your knee moves. An X-ray may follow if the exam points to arthritis.

Bring your medicine names and notes from earlier knee care. Say how long past relief lasted and which activity you miss.

Until the visit, avoid movements that sharply raise soreness. For soreness due to arthritis, QC Kinetix offers regenerative treatments using your blood, which medical providers draw, spin, and place into your knee at the clinic.

Sources

1. The 2015 Cochrane review of 27 trials (1,767 participants) found intra-articular corticosteroid better than sham for knee OA pain (SMD -0.40, 95% CI -0.58 to -0.22; NNTB 8), but the benefit decayed with time: moderate at 1-2 weeks, small at 13 weeks, and no evidence of any effect at 26 weeks. All outcomes were graded LOW quality.

   Jüni P, et al. — Intra-articular corticosteroid for knee osteoarthritis.. Cochrane Database Syst Rev, 2015. DOI: 10.1002/14651858.CD005328.pub3.

2. A meta-analysis of eight RCTs found the pooled effect of intra-articular corticosteroid on knee pain was -0.58 SMD (95% CI -0.88 to -0.27; NNT 5.1), with the effect approaching statistical insignificance at four months and a non-significant pooled risk ratio for adverse effects of 0.95.

   Saltychev M, et al. — The Magnitude and Duration of the Effect of Intra-articular Corticosteroid Injections on Pain Severity in Knee Osteoarthritis: A Systematic Review and Meta-Analysis.. Am J Phys Med Rehabil, 2020. DOI: 10.1097/PHM.0000000000001384.

3. A meta-analysis of 7 trials (606 participants) mapped the crossover between the two commonest injections: corticosteroid is relatively more effective for pain from baseline to week 4, the two are equal at week 4, and beyond week 8 hyaluronic acid has the greater effect.

   Bannuru RR, et al. — Therapeutic trajectory of hyaluronic acid versus corticosteroids in the treatment of knee osteoarthritis: a systematic review and meta-analysis.. Arthritis Rheum, 2009. DOI: 10.1002/art.24925.

4. The RUbICOn mixed-methods HTA study, commissioned specifically to address uncertainty about recurrent injections, combined a UK primary-care cohort (2005-2020) linked to hospital data with a safety analysis, patient and clinician interviews, and a three-round Delphi to set research priorities - the current formal acknowledgement that the long-term risks and benefits of repeat injections remain unresolved.

   Whitehouse MR, et al. — RecUrrent Intra-articular Corticosteroid injections in Osteoarthritis: the RUbICOn mixed-methods study.. Health Technol Assess, 2025. DOI: 10.3310/LFAJ9337.

5. A qualitative study interviewing 38 patients and 19 primary care clinicians found patients valued injections as an alternative to treatments they found undesirable, but reported wide variation in access, in onset and in how long the effect lasted; clinicians described an overarching theme of 'caution and competence', including uncertainty about the evidence and guidelines and the possibility of placebo.

   Moore AJ, et al. — Intra-articular corticosteroid injections for osteoarthritis: A qualitative study of patients' and clinicians' experiences.. PLoS One, 2024. DOI: 10.1371/journal.pone.0311668.