Arthritis affects millions of people in the UK, causing daily pain, stiffness, swelling, and reduced mobility. While medications and physiotherapy remain common treatments, more people are turning to red light therapy (RLT) as a drug-free way to manage joint pain naturally.
But does it actually work?
Research suggests red light therapy may help reduce inflammation, ease pain, and improve movement in people with arthritis — especially when used consistently over time.
In this guide, we’ll break down:
- What red light therapy is
- How it may help arthritis
- What scientific studies say
- Which types of arthritis may respond best
- How to use it safely at home
- What to look for when buying a device
If you’re completely new to red light therapy, start with our complete guide to Red Light Therapy for Pain Relief: Does It Work? Best Devices to Buy (2026 Guide) where we explain how the treatment works, its benefits, and the best devices available in the UK.
What Is Red Light Therapy?
Red light therapy uses specific wavelengths of red and near-infrared light to penetrate the skin and stimulate cells.
The light energy is absorbed by mitochondria — often called the “powerhouses” of cells — helping improve cellular energy production and supporting tissue repair. This process is commonly known as photobiomodulation.
RLT is now widely used for:
- Joint pain
- Muscle recovery
- Back pain
- Knee pain
- Skin health
- Inflammation reduction
Unlike UV light, red light therapy does not burn the skin and is generally considered non-invasive and low risk.
If you’re wondering when people usually start noticing improvements, our guide on How Long Does Red Light Therapy Take to Work? (Real Results Timeline) explains what affects results and how long recovery timelines typically take.
Can Red Light Therapy Help Arthritis?
Research suggests it can help manage symptoms for some people.
Arthritis causes inflammation inside the joints, which leads to:
- Pain
- Swelling
- Stiffness
- Reduced movement
Red light therapy may help by:
- Improving circulation
- Reducing inflammatory markers
- Supporting tissue repair
- Relaxing muscles around painful joints
- Increasing cellular energy production
Many users report improvements in:
- Morning stiffness
- Joint mobility
- Pain levels
- Recovery after activity
However, it’s important to understand that red light therapy is not a cure for arthritis. Instead, it may help reduce symptoms and improve quality of life when used consistently alongside healthy movement, recovery, and medical treatment.
What Does the Research Say?
Several studies have explored red light therapy for arthritis and chronic joint pain.
Researchers have found evidence that photobiomodulation may:
- Reduce inflammation
- Lower pain intensity
- Improve joint function
- Support cartilage and tissue healing
Some studies on osteoarthritis and rheumatoid arthritis have shown moderate improvements in pain and stiffness compared to placebo treatments.
Near-infrared wavelengths appear particularly promising because they can penetrate deeper into joints and tissues.
That said, results vary depending on:
- The severity of arthritis
- Device quality
- Wavelength used
- Treatment consistency
- Session duration
Overall, current evidence is encouraging, but researchers still call for larger long-term studies before drawing stronger conclusions.
Which Types of Arthritis May Benefit?
Osteoarthritis
Osteoarthritis is the most common type of arthritis and happens when joint cartilage gradually wears down over time.
Red light therapy may help reduce:
- Knee pain
- Hand pain
- Hip stiffness
- General inflammation
People with osteoarthritis often combine red light therapy with exercise, stretching, and physiotherapy to improve mobility and manage discomfort naturally.
Rheumatoid Arthritis
Rheumatoid arthritis is an autoimmune condition that causes chronic inflammation in the joints.
Some research suggests red light therapy may temporarily help reduce:
- Joint swelling
- Pain
- Morning stiffness
However, it should never replace treatment or medication prescribed by a healthcare professional.
General Joint Pain & Stiffness
Even without a formal arthritis diagnosis, red light therapy may still help with:
- Age-related joint discomfort
- Sports-related joint stress
- Chronic stiffness
Red light therapy is also commonly used for muscle tension and spinal discomfort, which we cover in our guide to Red Light Therapy for Back Pain: Benefits, Results & Best Devices
How Long Does It Take to See Results?
Results are rarely instant.
Some people notice small improvements after a few sessions, while others may need several weeks of consistent use.
Typical timelines include:
- Mild pain: 1–2 weeks
- Moderate stiffness: 3–6 weeks
- Chronic arthritis symptoms: 1–3 months
Consistency matters more than intensity.
Most experts recommend:
- 10–20 minute sessions
- 3–7 times per week
- Ongoing use for maintenance
Using red light therapy too often is not always better, which is why following a proper schedule matters. Our How Often Should You Use Red Light Therapy? (Safe Frequency Guide) explains the ideal treatment frequency for beginners.
Best Areas to Use Red Light Therapy for Arthritis
Common treatment areas include:
- Knees
- Hands
- Wrists
- Shoulders
- Hips
- Lower back
- Feet and ankles
For deeper joints like hips or shoulders, near-infrared light usually works better than standard red light alone because it penetrates further beneath the skin.
Are There Any Side Effects?
Red light therapy is generally considered safe when used correctly.
Most people experience little to no side effects.
Occasionally, some users report:
- Mild skin irritation
- Temporary redness
- Eye sensitivity from bright LEDs
- Temporary soreness after long sessions
Problems usually happen from overuse, excessive session lengths, or poor-quality devices.
While side effects are uncommon, it’s still important to understand potential risks and overuse symptoms before starting treatment. Read more in Red Light Therapy Side Effects: What You Need to Know
You should also read our complete Red Light Therapy Safety Guide (2026) before beginning regular treatment sessions at home.
What to Look for in a Red Light Therapy Device
Not all red light therapy devices are equal.
For arthritis support, look for:
- Near-infrared wavelengths (around 850nm)
- Medical-grade LEDs
- Sufficient power output
- Large coverage areas for joints
- Clinically tested or FDA-cleared devices
Portable wraps and panels are especially popular because they allow you to target painful joints directly from home.
Cheaper devices often lack the power needed for deeper tissue penetration, which may limit results for arthritis and chronic joint pain.
Is Red Light Therapy Worth Trying for Arthritis?
For many people, yes.
While it’s not a miracle cure, research suggests red light therapy may help reduce arthritis pain, improve mobility, and support recovery naturally.
The biggest advantages are that it’s:
- Non-invasive
- Drug-free
- Easy to use at home
- Generally safe
- Suitable for long-term use
The key is consistency, realistic expectations, and choosing a quality device designed for deeper joint support.
If you’re dealing with chronic joint pain, red light therapy may become a useful addition to your routine alongside exercise, physiotherapy, healthy movement, and medical advice.
Final Thoughts
Living with arthritis can make everyday activities feel harder than they should — from walking upstairs to simply opening a jar. While red light therapy will not cure arthritis, growing research suggests it may help reduce inflammation, ease stiffness, and make daily movement more comfortable over time.
Many people find the biggest improvements come from using it consistently as part of a wider recovery routine, rather than expecting instant results after one or two sessions.
If you’re looking for a non-invasive, drug-free way to support joint health at home, red light therapy may be worth exploring — especially for long-term arthritis management, recovery, and mobility support.
For a complete beginner-friendly overview, including how red light therapy works and the best devices available in the UK, read our full Red Light Therapy for Pain Relief Guide (2026)