The answer depends on several factors — including how the shot is administered and your personal pain tolerance. This guide will walk you through exactly what to expect, from the initial needle prick to the recovery period.
Simply put, the injection itself causes a sharp, burning pinch that lasts roughly 30 to 60 seconds. Most patients tolerate it well. However, about 5 to 10 percent of people experience a painful “steroid flare” 24 to 48 hours afterward, which can temporarily feel worse than the original condition.
Key Takeaways
- The actual cortisone shot for plantar fasciitis feels like a deep, burning pinch but only lasts about one minute.
- A post-injection flare causes significant pain in up to 10 percent of patients, typically peaking at the 24-hour mark.
- Your experience depends on needle size, practitioner skill, and whether numbing medication is used.
- Cortisone shots provide powerful short-term relief but are not a standalone cure for plantar fasciitis.
What Does a Cortisone Shot For Plantar Fasciitis Actually Feel Like?
Patients often describe the sensation as a deep, intense burning or stinging that radiates into the arch of the foot. Unlike a simple blood draw, this injection targets a dense, tight ligament that is already inflamed.
The medication itself — a mixture of corticosteroid and anesthetic — creates a temporary chemical burning sensation as it disperses into the tissue. This is normal and usually fades quickly.
- First sensation: A sharp pinch as the needle penetrates the skin.
- Second sensation: A deep, dull ache as the needle reaches the plantar fascia ligament.
- Third sensation: A burning or stinging feeling as the medication is injected.
- Aftermath: A throbbing ache that typically resolves within a few hours.
- Delayed pain: Some patients feel significant soreness 12 to 48 hours later (flare reaction).
Tip: Ask your doctor to apply a topical numbing spray or ice pack to the area before the injection. This reduces the initial skin puncture pain significantly.
How Painful Is the Injection Process Itself?
The actual injection process is very brief. Most patients rate the pain as a 4 to 6 out of 10 on a standard pain scale, but the worst part lasts less than a minute. Here is exactly what happens step-by-step.
- Positioning: You lie face down or sit with your foot extended. The doctor cleans the skin with alcohol or betadine.
- Numbing: Some doctors spray a topical refrigerant (like ethyl chloride) on the skin. This numbs the surface instantly.
- Insertion: The needle enters the skin and is guided toward the plantar fascia insertion point on the heel bone.
- Injection: The doctor depresses the plunger. You will feel pressure and a distinct burning sensation as the fluid enters the tight ligament.
- Withdrawal: The needle is removed, and a bandage is applied. The entire procedure takes 30 to 60 seconds.
Does the needle size matter?
Yes. A larger gauge needle (thinner) reduces pain, but the medication is thick. Doctors typically use a 25 to 27 gauge needle.
Thinner needles cause less pain but require slower injection pressure.
| Needle Gauge | Diameter | Pain Level | Common Use |
|---|---|---|---|
| 27G | Very thin | Low | Preferred by experienced practitioners |
| 25G | Thin | Moderate | Most common for plantar fascia injections |
| 22G | Thicker | Higher | Rarely used for this condition |
The thinner the needle, the less tissue trauma and nerve irritation you experience during insertion. Always ask your doctor if they plan to use a 27-gauge needle.
What Is the “Steroid Flare” and Why Does It Hurt?
The most misunderstood aspect of how painful a cortisone shot can be is the delayed reaction known as a “steroid flare.” This occurs when the crystalline form of the corticosteroid triggers an inflammatory response in the tissue.
Instead of feeling better, you feel significantly worse. The foot becomes hot, red, swollen, and extremely tender. This flare can last anywhere from 12 hours to 3 days.
- Incidence rate: Approximately 5 to 10 percent of patients experience a flare.
- Onset: Usually begins within 6 to 12 hours post-injection.
- Peak: Pain is most severe at the 24 to 48 hour mark.
- Duration: Resolves on its own within 2 to 5 days.
- Cause: Local reaction to the corticosteroid crystals, not an infection.
Warning: Do not confuse a steroid flare with an infection. If you have a fever, warmth spreading up the leg, or purulent drainage, seek immediate medical attention. These are signs of infection, not a flare.
Flare vs. Infection: How to tell the difference
| Symptom | Steroid Flare | Infection |
|---|---|---|
| Fever | No | Often present |
| Onset | 12 to 48 hours post-shot | 24 to 72 hours post-shot |
| Color changes | Redness at injection site | Red streaks spreading up foot |
| Response to ice | Good relief | Minimal relief |
| Duration | Resolves in 2-5 days | Worsens without antibiotics |
If you suspect an infection, do not wait. Contact your doctor immediately or visit urgent care. Flares are painful but harmless — infections require treatment.
What Factors Influence the Pain Level of a Cortisone Shot?
Not all injections are equal. The pain you experience is highly variable and depends on several controllable and uncontrollable factors.
Understanding these factors helps you set realistic expectations and choose the right provider.
- Provider skill level: An experienced orthopedist or podiatrist knows exactly where to inject. A precise injection is less painful than one that hits the wrong tissue layer.
- Use of anesthetic: Most doctors mix lidocaine or bupivacaine with the cortisone. This numbs the area as the shot goes in.
- Needle gauge: As discussed earlier, thinner needles cause less pain.
- Injection site: Injections directly into the plantar fascia origin on the heel bone are more painful than injections into the surrounding soft tissue.
- Chronicity of condition: Chronic, scarred tissue is often less sensitive than acutely inflamed tissue.
- Your pain tolerance: This is subjective. Some patients barely flinch, while others find the procedure very distressing.
- Use of ultrasound guidance: Ultrasound-guided injections are more accurate, reducing the number of needle passes and overall pain.
| Factor | Reduces Pain | Increases Pain |
|---|---|---|
| Guidance | Ultrasound used | Blind injection (palpation only) |
| Needle | 27-gauge | 22- or 23-gauge |
| Anesthetic | Mixed with steroid | No anesthetic used |
| Surface numbing | Topical spray or ice | No surface numbing |
| Patient relaxation | Calm and distracted | Tense and anxious |
If you are anxious, tell your doctor. They can use a numbing spray, a smaller needle, or ultrasound guidance to minimize your discomfort.
How Effective Is a Cortisone Shot for Plantar Fasciitis Pain?
Despite the temporary pain of the injection, cortisone shots are highly effective for short-term relief. A 2012 study in the Journal of Bone and Joint Surgery found that corticosteroid injections provided significant pain relief for up to four weeks compared to placebo.
However, the same study noted no significant difference at six months, meaning cortisone is not a long-term solution. It is best used as a bridge to allow you to perform physical therapy and stretching.
Timeline of Pain Relief
| Time Period | Pain Level | Notes |
|---|---|---|
| Day 0 (Injection) | 4 to 6 / 10 | Procedure pain + immediate soreness |
| Day 1 to 2 | 3 to 8 / 10 | Variable. Flare might occur. |
| Day 3 to 7 | 1 to 3 / 10 | Significant relief of heel pain |
| Week 2 to 4 | 1 to 4 / 10 | Maximum benefit period |
| Month 3 to 6 | 3 to 7 / 10 | Symptoms often return without PT |
The goal of a cortisone injection is to break the cycle of pain and inflammation. Use the pain-free window to aggressively pursue stretching, orthotics, and strengthening exercises.
What Are the Risks and Side Effects of Cortisone Injections?
While generally safe, cortisone shots are not without risks. The most common side effects are directly related to how painful a cortisone shot can be in the short term, but there are more serious long-term risks.
Repeated or poorly placed injections can cause permanent damage to the plantar fascia.
- Tissue atrophy: Cortisone can cause fat pad atrophy, leading to a permanently sunken and tender heel pad.
- Plantar fascia rupture: This is a serious complication. The steroid weakens the ligament, and a sudden movement can cause it to snap. This occurs in roughly 2 to 3 percent of cases.
- Nerve damage: Direct injection into a nerve can cause numbness, tingling, or chronic nerve pain.
- Tendon weakening: If the injection accidentally goes into the Achilles tendon, it can predispose you to rupture.
- Skin depigmentation: Darker skin tones may develop light spots at the injection site.
Important: Most experts recommend no more than three cortisone shots per year for the same condition. Exceeding this limit significantly increases the risk of plantar fascia rupture and fat pad atrophy.
What Should You Do If the Pain Gets Worse After the Shot?
If you experience a severe pain flare after your injection, do not panic. A flare is painful but rarely dangerous. Here is exactly how to manage it.
- Ice aggressively: Apply an ice pack wrapped in a thin towel to the heel for 15 to 20 minutes every hour. Do not apply ice directly to the skin.
- Elevate the foot: Keep your foot raised above heart level to reduce swelling and throbbing.
- Avoid walking: Stay off the foot as much as possible for the first 48 hours. Use crutches if necessary.
- Take NSAIDs: Ibuprofen or naproxen can help reduce the flare reaction. Ask your doctor before taking any new medication.
- Call your doctor: If the pain is unbearable or does not start improving after 72 hours, contact your provider. They may prescribe a stronger anti-inflammatory or a short course of oral steroids.
Most flares resolve completely within a few days. Once the flare subsides, you will likely experience excellent relief from your original plantar fasciitis pain.
How Does Cortisone Compare to Other Treatments for Plantar Fasciitis?
Many patients wonder if the temporary pain of a cortisone shot is worth it compared to other options. The truth is, each treatment has a different role, and they are often used together.
Below is a comparison of common treatments based on pain level, effectiveness, and cost.
| Treatment | Procedure Pain | Onset of Relief | Duration of Effect |
|---|---|---|---|
| Cortisone Injection | Moderate (short burst) | 3 to 7 days | 4 to 6 weeks |
| Extracorporeal Shockwave (ESWT) | Moderate (during session) | 6 to 12 weeks | 12 to 24 months |
| Physical Therapy / Stretching | None to mild | 4 to 8 weeks | Long-term (if maintained) |
| Orthotics / Night Splints | None | 2 to 6 weeks | Ongoing with use |
| Platelet-Rich Plasma (PRP) | Moderate to high (flare) | 4 to 8 weeks | 12 to 24 months |
For acute, debilitating heel pain, a cortisone shot offers the fastest relief. For chronic cases, shockwave therapy or PRP may provide better long-term results without the risks of steroid use.
Frequently Asked Questions
Should I get a cortisone shot for plantar fasciitis?
A cortisone shot is best for acute, severe heel pain that prevents you from walking or performing daily activities. It is not recommended as a first-line treatment for mild or moderate cases. Most experts recommend trying conservative care — such as stretching, ice, and orthotics — for at least 6 weeks before considering an injection.
Can a cortisone shot make plantar fasciitis worse?
Yes, in two ways. First, the steroid flare can cause a temporary worsening of pain for 24 to 48 hours. Second, repeated steroid injections can weaken the plantar fascia and eventually cause a rupture, which leads to a flat foot deformity and chronic pain that is much worse than the original condition.
How long does the pain from a cortisone shot last?
The sharp pain from the injection itself lasts about 30 to 60 seconds. Soreness at the injection site typically resolves within 24 hours. If you experience a steroid flare, the intense pain can last between 12 hours and 5 days.
Most patients report feeling significant relief of their original plantar fasciitis pain within 3 to 7 days.
Can you walk after a cortisone shot in the foot?
You can walk immediately after the injection, but you should minimize walking for the first 24 to 48 hours. Resting the foot reduces the risk of a flare and allows the medication to settle into the tissue. Your doctor will likely recommend that you avoid high-impact activities like running or jumping for at least one week.
What is the success rate of cortisone shots for plantar fasciitis?
Clinical studies report that cortisone injections provide significant short-term relief in approximately 70 to 80 percent of patients. However, the recurrence rate is high — around 50 percent of patients report their pain returning within 6 months if they do not follow up with a structured stretching and strengthening program.
Final Thoughts
Understanding how painful a cortisone shot is for plantar fasciitis allows you to prepare mentally and physically for the procedure. The brief sting of the injection is manageable, but the potential flare reaction is the real challenge. Cortisone is a powerful tool for breaking the cycle of pain, but it works best when combined with physical therapy and lifestyle changes.
Use the relief window wisely to address the root cause of your condition.
