LLLT series (Part 1): Where Can Low-Level Laser Therapy Help in Orofacial Pain?
- Dr. Chandrashekhar
- 1 day ago
- 6 min read
Low-Level Laser Therapy (LLLT), also known as photobiomodulation therapy (PBM), is increasingly being studied as a non-invasive option for several types of oral and facial pain.
What makes PBM particularly interesting in orofacial pain is its versatility. Jaw and facial pain can arise from joints, muscles, nerves, oral tissues, or a combination of these. PBM may influence inflammation, pain signaling, cellular metabolism, and tissue recovery, making it potentially useful across several different conditions.
Importantly, the research on Photobiomodulation for acute and chronic facial pain is not equally strong for every indication. Some uses have fairly encouraging clinical evidence, while others are still emerging.
1. TMJ Pain and Temporomandibular Disorders
This is one of the most studied applications of photobiomodulation in orofacial pain.
Patients with temporomandibular disorders may experience pain directly over the jaw joint, pain with chewing, tenderness around the joint, stiffness, or limited jaw function.
Recent systematic reviews have found that PBM can reduce pain and improve jaw function in patients with TMD. A 2025 review specifically comparing muscular and joint-related TMD found beneficial effects in both groups, although treatment response and study quality varied. (PubMed)
What does the literature show?
Evidence: Encouraging
PBM appears to be a reasonable conservative adjunct for selected patients with painful TMD, particularly when inflammation or localized musculoskeletal pain is involved. However, treatment techniques vary widely between studies, so there is still no single universally accepted protocol.
2. Jaw Muscle Pain and Myofascial Pain
Not every patient who says they have “TMJ pain” actually has pain coming from the joint.
The masseter and temporalis muscles are frequent sources of facial pain. Patients may describe aching in the cheeks or temples, pain while chewing, facial fatigue, tenderness, or headaches associated with jaw tension.
Deeper jaw muscles, including the medial and lateral pterygoid regions, may also contribute in selected patients. PBM can be directed toward painful muscular areas as part of a broader treatment program.
What does the literature show?
Evidence: Encouraging, but variable
Clinical studies and systematic reviews of TMD suggest that photobiomodulation can reduce muscular pain and improve mandibular function. The results are not uniform, however, in part because studies use very different treatment techniques and dosing protocols. (PubMed)
For this reason, PBM is generally best used alongside other measures such as physical therapy, therapeutic exercises, habit modification, and treatment of contributing jaw-loading factors.
3. Burning Mouth Syndrome
Burning Mouth Syndrome (BMS) can cause persistent burning, tingling, or uncomfortable sensations of the tongue, lips, palate, or other oral tissues—often without visible abnormalities.
This can be a particularly frustrating condition because symptoms may persist even when routine dental and medical examinations appear normal.
Photobiomodulation has become one of the more actively researched non-drug treatment options for BMS.
What does the literature show?
Evidence: Promising
A 2025 systematic review and meta-analysis of 13 studies involving more than 500 patients found that both red and infrared PBM were associated with reduced pain compared with placebo. However, the authors rated the certainty of the evidence as low because treatment protocols differed substantially between studies. (PubMed)
Even more recently, the World Association for Photobiomodulation Therapy (WALT) issued a 2026 position paper supporting clinical practice recommendations for PBM in primary Burning Mouth Syndrome based on the available randomized clinical evidence. (PubMed) This makes BMS one of the more interesting emerging applications of photobiomodulation in orofacial pain care.
4. Trigeminal Neuralgia and Nerve-Related Facial Pain
Nerve-related facial pain is very different from muscle or joint pain.
Patients may describe:
electric or shock-like pain
burning
tingling
hypersensitivity
numbness
pain following dental procedures, trauma, or surgery
Photobiomodulation is being investigated because light therapy may influence peripheral nerve activity and neuroinflammatory processes.
What does the literature show?
Evidence: Emerging
A systematic review evaluating PBM for trigeminal neuralgia found that it may provide benefit as an adjunct to conventional therapy, although the number of available studies was small. (PubMed) The 2026 WALT position paper found enough evidence to issue expert-consensus recommendations for idiopathic trigeminal neuralgia, while noting that evidence remains insufficient for some other neuropathic facial pain conditions, including post-traumatic trigeminal neuropathy. (PubMed) A separate 2026 systematic review and meta-analysis has also continued to examine PBM for trigeminal and post-herpetic neuralgia. (PubMed) So, while PBM is not a replacement for established treatment of trigeminal neuralgia, it represents an evolving adjunctive option.
5. Pain After Dental or Oral Surgical Procedures
Photobiomodulation has also been extensively studied following oral surgery.
After procedures such as wisdom-tooth removal, patients commonly experience pain, swelling, and temporary difficulty opening the mouth.
PBM may help modify the inflammatory response that occurs after tissue injury.
What does the literature show?
Evidence: Promising for pain and swelling
A systematic review and meta-analysis found that LLLT reduced postoperative pain and swelling after third-molar surgery, although its effect on limited mouth opening was less certain. (PubMed)
A larger analysis involving 1,347 patients also found reductions in postoperative pain and swelling, although the certainty of the evidence was rated low. (PubMed)
A 2025 meta-analysis likewise reported potential benefits for postoperative pain, swelling, and trismus but concluded that better-quality research is still needed. (PubMed)
6. Neck and Shoulder Muscle Pain That Contributes to Facial Pain
Jaw pain does not always begin in the jaw.
The nerves and muscles of the jaw, head, and upper neck are closely interconnected. Some patients with facial pain also have significant tenderness in the temporalis, sternocleidomastoid, upper trapezius, or other cervical muscles.
When these muscles contribute to the patient's overall pain pattern, photobiomodulation may be incorporated into treatment.
What does the literature show?
Evidence: Supportive from the broader musculoskeletal literature
PBM has been widely studied for musculoskeletal and myofascial pain outside the face. Its use for cervical contributors to orofacial pain is therefore biologically and clinically reasonable, although there is less research specifically examining this application within an orofacial pain population.
7. Headache With a Musculoskeletal Component
Headache and jaw pain frequently overlap.
A patient with migraine may also have painful temporalis muscles, jaw clenching, cervical muscle tenderness, or a coexisting temporomandibular disorder.
In these situations, PBM may be directed toward the musculoskeletal component of the patient's pain rather than being considered a stand-alone treatment for the headache disorder itself.
What does the literature show?
Evidence: Depends on the headache mechanism
The evidence is stronger for treating associated muscular and temporomandibular pain than for using PBM as a general treatment for all forms of headache.
This distinction is important: the goal is to identify and treat the structures contributing to a patient's pain rather than treating every headache with the same approach.
What Makes LLLT Different?
One of the most useful features of photobiomodulation is that the treatment can be adapted to the source of pain.
The same technology may be used differently for:
Condition | Treatment goal |
TMJ pain | Reduce pain and inflammatory activity |
Masseter or temporalis pain | Reduce muscular pain and tenderness |
Deep jaw-muscle pain | Reduce muscular pain |
Burning Mouth Syndrome | Modulate abnormal oral pain signaling |
Nerve-related facial pain | Influence peripheral nerve and neuroinflammatory mechanisms |
Post-procedure pain | Reduce pain and inflammatory response |
Neck-related facial pain | Address musculoskeletal contributors to the pain pattern |
That does not mean LLLT treats every type of pain.
It means it can be used in different ways when the diagnosis and treatment target are appropriate.
Is LLLT a Cure?
No treatment for chronic orofacial pain should be presented as a universal cure.
Some patients respond very well to photobiomodulation, some experience partial improvement, and some may not respond significantly.
The research also differs considerably from one condition to another. The strongest evidence currently exists for certain temporomandibular disorders and Burning Mouth Syndrome, while applications for several neuropathic facial pain conditions remain under investigation. (PubMed)
A Diagnosis Comes Before the Laser
Perhaps the most important point is that LLLT is a treatment modality, not a diagnosis.
Facial pain may arise from a painful jaw joint, muscle dysfunction, nerve injury, migraine, Burning Mouth Syndrome, dental disease, or several overlapping problems.
The first question should therefore not be: “Can we laser it?”
It should be: “What is causing the pain?”
Once the contributing structures and pain mechanisms have been identified, photobiomodulation can be considered as one part of an individualized treatment plan.
The Bottom Line
Photobiomodulation has grown well beyond its early use as simply a treatment for “TMJ pain.”
Research now supports or is actively investigating its use for TMJ disorders, masticatory muscle pain, Burning Mouth Syndrome, selected neuropathic facial pain conditions, and postoperative oral pain and swelling.
Its greatest strength may be its versatility: one non-invasive technology that can be applied differently depending on whether the clinical target is a joint, muscle, nerve, or oral tissue.
And in orofacial pain. where those different pain mechanisms frequently overlap, that versatility matters.
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