Pain injections deliver medication directly to a targeted site in the body, such as a joint, the spine, or a nerve cluster. Healthcare providers use them as one component of a broader treatment plan, which may also include oral medication or activity modifications. Each injection type uses a distinct substance, and they serve a specific clinical purpose, such as reducing inflammation. Here’s information about several types of pain injections and their benefits:
Corticosteroid Injections
Corticosteroids are synthetic versions of hormones the body produces naturally, and providers use them for their anti-inflammatory properties. Unlike oral steroids, which travel through the entire body, an injection places medication at a precise, targeted location. This focused delivery is a key advantage of the injectable approach.
Providers administer corticosteroid injections into joints such as the knees, shoulders, hips, and hands; they may also use them in soft tissues like bursae and tendon sheaths. Epidural steroid injections target spinal nerves in the lower back or neck. For deeper or more precise placement, providers may use imaging guidance, such as ultrasound or fluoroscopy, a form of real-time X-ray.
During the procedure, the provider cleans the skin and often applies a local anesthetic to numb the area. These pain injections may combine the corticosteroid with a numbing agent in the same syringe. Providers sometimes limit the number of corticosteroid injections a person receives in the same area each year, so ask your provider about recommended spacing and what to expect in the days that follow.
Hyaluronic Acid Injections
Hyaluronic acid is a substance found naturally in the fluid that surrounds your joints, where it acts as both a lubricant and a shock absorber. Hyaluronic acid injections, also called viscosupplementation, introduce a gel-like form of this substance directly into the joint space. Providers may use these injections for the knee, particularly in people with osteoarthritis. Treatment protocols vary by product. Some require a single injection, while others involve a series of weekly injections over several weeks. Before administering the injection, the provider may also remove excess joint fluid to make room for the gel.
Nerve Block Injections
A nerve block delivers an anesthetic, sometimes combined with a corticosteroid, near a specific nerve or group of nerves. The goal is to interrupt pain signals traveling to the brain. Providers may use nerve blocks for two fundamental purposes: diagnostic and therapeutic. A diagnostic block helps identify the source of a problem, and a therapeutic block targets pain in a known area.
Nerve block types can include:
- Occipital nerve blocks: Target nerves at the back of the head
- Medial branch blocks: Target nerves connected to the small joints of the spine
- Sympathetic nerve blocks: Target nerves that govern involuntary body functions
- Peripheral nerve blocks: Target nerves in the arms or legs, frequently used during surgery
Providers sometimes perform nerve blocks with imaging guidance; this helps them place the needle accurately. Diagnostic block results may inform decisions about follow-up procedures such as radiofrequency ablation. Bringing a full medication list to your appointment, especially if you take blood thinners, gives your provider the context needed to plan your care.
Learn More About Pain Injections
Corticosteroid injections, hyaluronic acid injections, and nerve blocks each take a distinct approach to targeting pain at its source. Corticosteroids reduce inflammation, and hyaluronic acid supplements joint fluid. Through nerve blocks, providers help interrupt pain signals to reduce symptoms. Understanding how each type works lets you have a more informed discussion with your provider. Write down your questions, schedule an appointment, and take an active role in determining which option fits your needs.
