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Nerve Blocks and Interventional Pain Relief in Advanced Cancer
By Dr. Gajendra Kumar Himanshu
Nerve blocks are medical procedures that reduce cancer pain by placing medicine around a nerve or group of nerves that carry pain signals. In advanced cancer, nerve blocks and other interventional pain treatments may be considered when pain is severe, focused in one area, difficult to control with medicines, or when pain medicines cause troublesome side effects. These treatments are usually part of a wider pain management plan, not a replacement for cancer treatment.
Pain can be caused by the cancer itself, treatment, surgery, nerve pressure or damage, or other health problems. When ordinary pain medicines do not provide enough relief, an interventional pain specialist may consider procedures such as nerve blocks, nerve ablation, epidural or intrathecal medicine delivery, depending on the type and location of pain.
In this blog, we will explain how these treatments work, when they may be useful, what patients can expect, possible risks, and how they can improve comfort and daily life.
What Is Interventional Pain Relief?
Interventional pain relief means using a medical procedure to target the source or pathway of pain instead of relying only on tablets or injections. A nerve block is one example.
The goal is to reduce pain while helping the patient remain as comfortable and active as possible. The exact procedure depends on whether the pain comes from the abdomen, pelvis, chest, back, limbs, or another part of the body.
Oncare also explains how cancer pain management goes beyond painkillers, including options such as nerve blocks, radiation therapy, physical therapy and palliative care.
Why Can Advanced Cancer Cause Severe Pain?
Advanced cancer can cause pain in several ways. A tumour may press on bones, nerves or nearby organs. Cancer may also spread to the bones or cause inflammation and swelling. Some cancer treatments, including surgery, chemotherapy and radiation therapy, can also cause pain.
Nerve-related pain can feel different from other types of pain. Patients may describe it as burning, shooting, electric-like, tingling, or painful even when the skin is lightly touched.
Because different types of pain need different treatments, doctors first try to understand exactly where the pain comes from and how it feels. This helps them choose the most suitable approach.
When Are Nerve Blocks Considered?
Nerve blocks may be considered when pain is coming from a particular nerve or group of nerves, and standard medicines are not providing enough relief. They may also be useful when increasing pain medicine causes side effects such as excessive sleepiness, nausea or confusion.
A nerve block may be used to:
- Reduce pain in a specific area.
- Help identify which nerve is causing the pain.
- Reduce the need for some pain medicines.
- Improve comfort and daily activity.
- Support a broader palliative or cancer pain plan.
Nerve blocks are not suitable for every patient. The doctor considers the cause of pain, cancer location, medicines, blood clotting, infection risk, and overall health before recommending a procedure.
Common Nerve Blocks Used in Cancer Pain
Different nerves and nerve groups can be targeted depending on where the pain is located.
Celiac Plexus Block
A celiac plexus block may be used for severe upper abdominal pain, particularly pain associated with pancreatic cancer. The celiac plexus is a group of nerves located in the upper abdomen that carries pain signals from several abdominal organs. It is the most commonly used neurolytic sympathetic nerve block for upper abdominal cancer pain.
Superior Hypogastric Plexus Block
This type of block may be considered for certain lower abdominal or pelvic pain conditions. It targets a group of nerves involved in carrying pain signals from pelvic organs.
Peripheral Nerve Blocks
When pain comes from a particular region or peripheral nerve, a local nerve block may be considered. Depending on the location, doctors may target nerves or nerve groups such as the femoral, sciatic, brachial plexus, or other peripheral nerves.
Nerve Blocks vs Pain Medicines
Pain medicines remain an important part of cancer pain treatment. Most cancer pain can be managed with medicines, but some patients have pain that remains difficult to control or experience unwanted side effects from higher medicine doses. In these situations, an interventional approach may be considered.
Treatment approach | How it works | When it may help |
|---|---|---|
Oral pain medicines | Work throughout the body | Many types of cancer pain |
Nerve block | Blocks pain signals from a specific nerve or area | Localised or nerve-related pain |
Neurolytic block | Damages selected pain-carrying nerves to provide longer-lasting relief | Selected severe cancer pain |
Epidural medicine | Delivers medicine near nerves around the spinal cord | Certain severe pain conditions |
Intrathecal medicine | Delivers medicine into the fluid around the spinal cord | Selected severe pain that is difficult to control |
Radiation therapy | Treats a painful cancer site | Pain caused by some tumours, especially bone metastases |
The best approach may involve more than one treatment. Your cancer and pain teams can decide which combination is appropriate for you.
What Is a Neurolytic Nerve Block?
A neurolytic block is designed to interrupt a nerve's ability to carry pain signals for a longer period. Doctors may use substances such as alcohol or phenol in selected procedures to destroy or damage targeted pain-carrying nerves.
These procedures are different from temporary nerve blocks that use local anaesthetic. A neurolytic procedure is usually considered only when the expected benefits outweigh the possible risks.
The goal is not to treat the cancer itself. It is to reduce pain and improve comfort.
What Happens During a Nerve Block?
The exact procedure depends on the nerve being treated. Doctors may use imaging guidance, such as CT or ultrasound, to help place the needle accurately.
The skin is cleaned, and local anaesthetic is usually used to reduce discomfort. A needle is then guided toward the target nerve or nerve group, and the medicine is delivered.
Some procedures are done as a short hospital or clinic procedure, while others may require more monitoring. Your doctor will explain whether you need to avoid eating or drinking before the procedure and whether you need someone to take you home.
What Are the Benefits?
For carefully selected patients, interventional pain procedures can provide meaningful pain relief.
Reducing pain may make it easier for a patient to:
- Sleep better.
- Move more comfortably.
- Eat and perform daily activities.
- Reduce the need for some pain medicines.
- Spend more comfortable time with family.
The level and duration of relief vary from person to person. A nerve block may provide temporary relief, while some neurolytic procedures can last longer.
What Are the Possible Risks?
Like any medical procedure, nerve blocks have possible risks. These depend on the specific procedure and the patient's health.
Possible problems may include bleeding, infection, temporary numbness, weakness, low blood pressure, or injury to nearby structures. Some blocks may also cause pain or soreness where the needle was inserted.
The doctor will discuss the expected benefits and risks before the procedure. Patients should tell their medical team about blood-thinning medicines, allergies, infections, and other health conditions.
The Role of Palliative Care
Interventional pain relief is often part of palliative care, which focuses on improving comfort and quality of life. Palliative care can be provided alongside active cancer treatment and is not limited to the final stage of life.
It can help manage pain as well as other symptoms such as nausea, breathing problems, tiredness, and emotional stress. Oncare's palliative care service explains how this type of care can be provided alongside cancer treatment.
The goal is to treat the whole patient rather than focusing only on the cancer.
When Should You Tell Your Doctor About Cancer Pain?
Do not wait for severe pain before telling your cancer team. Discussing pain early is important because good pain control can improve quality of life, and each patient needs an individual pain plan.
Tell your doctor if:
- Your current pain medicine is no longer working well.
- Pain is stopping you from sleeping or moving.
- You are having troublesome side effects from pain medicines.
- You have new burning, shooting, or electric-like pain.
- Pain suddenly becomes much worse.
Early assessment can help your healthcare team identify the cause and consider additional treatment options.
To learn more about nerve blocks, you can visit the National Library of Medicine.
Consult Today
Severe cancer pain should not simply be accepted as something a patient has to live with. Nerve blocks and other interventional pain procedures may provide relief for selected patients, particularly when pain is focused in a specific area or remains difficult to control with medicines.
At Oncare Cancer Hospital, patients can discuss cancer pain, nerve blocks, palliative care and other supportive treatment options with their cancer care team. If you or your loved one has advanced cancer and pain is affecting sleep, movement, eating or daily life, speak with a specialist about a personalised pain management plan.
Disclaimer
This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Whether a nerve block or another pain procedure is suitable depends on each patient's condition. Always discuss pain management and treatment decisions with a certified cancer healthcare provider.
Frequently Asked Questions
A nerve block may significantly reduce pain in some patients, but the amount and duration of relief vary. It is not a cure for cancer.
Not necessarily. Nerve blocks and pain medicines may be used together. The right treatment depends on the cause and location of pain and the patient's overall condition.
Yes, celiac plexus blocks are commonly used for upper abdominal cancer pain, including pain associated with pancreatic cancer.
No, palliative care can be provided at different stages of cancer and can be given alongside active cancer treatment.
Written and Verified by:
Dr. Gajendra Kumar Himanshu Exp: 10 Yr
Medical Officer
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