Cortisone and PRP do two different jobs. Cortisone is a steroid that suppresses inflammation, it works fast, often within days, but it does not heal the tissue and the relief usually fades in about 6 to 12 weeks. PRP (platelet-rich plasma) is slower, taking 4 to 12 weeks, but it aims to stimulate your body's own repair, so when it works it tends to last longer. Neither is "better" in the abstract. The right choice depends on your condition, your timeline, and how many shots you have already had.
There is a lot of marketing noise on both sides of this question. Some clinics treat cortisone like it is dangerous; others treat PRP like a miracle. Both framings are wrong. Cortisone is a genuinely useful, time-tested tool with a legitimate place. PRP is well supported for certain conditions and overhyped for others. This article lays out how each one actually works, what the studies show, and when each one is the smarter call, with the evidence named and the trade-offs left in.
How each one works
Cortisone, an anti-inflammatory off-switch
Cortisone (a corticosteroid such as triamcinolone or methylprednisolone) is a potent anti-inflammatory. Injected into a joint or around a tendon, it powerfully suppresses the local inflammatory response that drives pain and swelling. That is why it can feel close to miraculous in the first week. The important thing to understand is what it does not do, it does not repair cartilage, it does not heal a tendon, and it does not change the underlying problem. It turns down the alarm without fixing the wiring.
PRP, a signal to repair
PRP starts with a small sample of your own blood, which is spun in a centrifuge to concentrate the platelets. Platelets are packed with growth factors, the biological signals your body uses to start tissue repair. That concentrate is injected, ideally under ultrasound guidance, into the injured tissue to stimulate a healing response. The aim is fundamentally different from cortisone, instead of muting inflammation, PRP tries to recruit the body's own repair machinery to the area that needs it. That is also why it is slower, real tissue healing takes weeks, not days.
The simplest way to think about it: cortisone manages the symptom, PRP targets the cause. One is a pain off-switch, the other is a repair signal. Which one you want depends on what you are actually trying to accomplish.
Speed vs. durability
This is the core trade-off, and it is worth being plain about.
- Cortisone is fast but short. Relief often arrives within a few days. For most joint and tendon conditions, it typically lasts only about 6 to 12 weeks before the pain can return.
- PRP is slow but durable. Most people notice gradual improvement over 4 to 12 weeks as the tissue responds. When PRP works for the right condition, the benefit tends to last considerably longer than a cortisone shot, because it addresses the tissue rather than masking the inflammation.
So if your real question is "I have something important in three weeks and I need this calmed down now," cortisone has a clear edge. If your question is "I want this to actually get better and stay better," PRP is built for that goal, provided the evidence supports it for your specific condition.
The honest downsides of cortisone
Cortisone earns its place, but repeated use carries real, well-documented risks that a good clinician will not gloss over.
It can harm the very tissue you are treating. In a 2017 randomized trial published in JAMA (McAlindon and colleagues), patients with knee osteoarthritis who received a cortisone injection every three months for two years had significantly more cartilage loss than those given a placebo injection, and they got no better pain relief for it. Around tendons, repeated corticosteroid can weaken the collagen and, in some cases, contribute to tendon damage or rupture. This is why most physicians limit cortisone to roughly three to four injections per joint per year.
For tennis elbow specifically, the long-term data is striking. In a landmark 2013 JAMA randomized trial (Coombes and colleagues), people who received a corticosteroid injection for tennis elbow actually did worse than placebo by 12 months, with lower recovery rates and much higher recurrence. Systematic reviews echo this, cortisone helps in the first few weeks but is less effective than no injection at all (or than physical therapy) at 6 and 12 months. Head-to-head against PRP, the long-term numbers favor PRP, with roughly 73% of PRP patients succeeding versus about 49% with corticosteroid in the longer-term follow-up of randomized trials. See our full breakdown of PRP for tennis and golfer's elbow.
For chronic plantar fasciitis, the same pattern holds. 2024 to 2025 meta-analyses comparing PRP and cortisone for the heel found that the two are roughly comparable in the first month, but PRP delivers better, longer-lasting relief from about six to twelve months onward, because it works on the tissue rather than just the inflammation. Read the plantar fasciitis evidence.
When cortisone is still the right call
None of the above means cortisone is bad medicine. There are clear situations where it is the smarter, more practical choice:
- You need relief now. A wedding, a trip, a work deadline, a flare so painful you cannot sleep, cortisone's speed is a real advantage when the priority is the next few weeks.
- It is your first shot and you are not getting them often. A single, well-placed cortisone injection for an acute flare is generally low risk. The documented harms come mainly from frequent, repeated use.
- The condition responds well to it. For some inflammatory conditions, bursitis, certain acute flares, and a few specific joint problems, cortisone is genuinely effective and appropriate as a first step.
- Cost or coverage is the deciding factor. Cortisone is inexpensive and usually covered by insurance. PRP is typically cash-pay. For the right short-term problem, the cheaper option can be the right option. See our transparent PRP pricing and HSA/FSA details.
Cortisone vs. PRP, side by side
| Cortisone | PRP | |
|---|---|---|
| How it works | Steroid that suppresses inflammation | Concentrated platelets and growth factors that stimulate repair |
| Onset | Days | 4 to 12 weeks (gradual) |
| Typical duration | About 6 to 12 weeks | Often months to longer when it works |
| Heals the tissue? | No, it quiets inflammation only | Aims to, it targets the underlying tissue |
| Cost & coverage | Inexpensive, usually insurance-covered | Cash-pay (HSA/FSA generally eligible) |
| Best for | Fast short-term relief, acute flares, certain inflammatory conditions | Chronic tendon and joint problems where durable healing is the goal |
| Main downsides | Repeated use can weaken tendon and erode cartilage; limited to ~3 to 4 shots/year | Slower onset, out-of-pocket cost, evidence is condition-specific |
So which one is right for you?
Here is the honest verdict, it genuinely depends on your condition, and any clinician who gives you a one-size answer is selling something.
- Need fast relief for a short-term reason? Cortisone is often the practical choice, especially for a first shot.
- Chronic tennis or golfer's elbow? The long-term evidence favors PRP, with cortisone potentially making things worse past a few months. More here.
- Stubborn plantar fasciitis that cortisone only quiets for a few weeks? PRP tends to win past the six-month mark. More here.
- Knee arthritis that is not yet bone-on-bone? PRP is the better-supported regenerative option, and repeated cortisone is the one to be cautious about. More here.
- Already had several cortisone shots in the same spot? That is exactly when it is worth looking at a different approach before the tissue takes more wear.
The real decision is not "cortisone or PRP" in the abstract, it is "which one fits my condition, my timeline, and my history of injections." That is a two-minute conversation away. Find out whether you are a candidate for PRP, and get an honest answer either way.
Medically reviewed
Reviewed by Dr. David Hock, DO, Board-Certified Orthopedic Surgeon, affiliated with Hilo Medical Center. Published June 15, 2026 · Last reviewed June 15, 2026. This article is for education and is not a substitute for an individual medical evaluation.
Frequently asked questions
Is PRP better than cortisone?
It depends on what you want. Cortisone is better for fast, short-term relief, it can calm a painful joint or tendon in a few days. PRP is better for durable, longer-term results because it aims to treat the underlying tissue rather than just mute inflammation. For chronic tennis elbow and chronic plantar fasciitis, randomized trials show PRP outperforms cortisone past about six months. For a quick flare-up you need calmed down this week, cortisone may be the smarter, cheaper choice.
Can cortisone damage my joint or tendon?
Repeated cortisone can. A 2017 JAMA randomized trial found that a cortisone injection into the knee every three months for two years caused significantly more cartilage loss than placebo, with no better pain relief. Corticosteroid can also weaken tendons with repeated use. That is why most physicians limit cortisone to roughly three to four injections per joint per year. A single, well-placed shot for a flare is generally low risk; the concern is frequent, repeated use.
Should I get cortisone or PRP for tennis elbow?
For chronic tennis or golfer's elbow, the long-term evidence favors PRP. Cortisone works faster in the first few weeks, but in randomized trials (including a 2013 JAMA study) corticosteroid recipients actually did worse than placebo by 12 months, with higher recurrence. Head-to-head, roughly 73% of PRP patients succeed long-term versus about 49% with cortisone. Cortisone can still make sense if you need short-term relief for a specific event, but it is not the better long-term bet for the elbow.
How long does each injection last?
Cortisone usually works within a few days and typically lasts about 6 to 12 weeks. PRP is slower, most people notice gradual improvement over 4 to 12 weeks as the tissue responds, but when it works the relief tends to last considerably longer because it targets the source rather than masking it.