Arasu Rayen

My approach to patient care is built on the belief that every individual deserves to be heard, understood, and treated with precision and compassion. Chronic pain is never just a symptom—it is a complex, life‑altering experience that affects physical function, emotional resilience, and overall quality of life. I take a holistic, evidence‑based approach, combining advanced ultrasound‑guided interventions with innovative, non‑invasive therapies to deliver safe, targeted, and meaningful relief. My goal is simple: to restore confidence, function, and independence, and to support patients in reclaiming the life they want to live. 

I have published my research in several peer-reviewed international journals. My recent publications include: 
 
Fitzmaurice B.C., Grenfell R.L., Heneghan N.R., Rayen A.T.A., Soundy, A.A., The Fibromyalgia Decomposition Phenomenon: A Reflexive Thematic Analysis. Behav. Sci. 2024, 14, 47. 
 
Fitzmaurice B.C., Grenfell R.L., Heneghan N.R., Rayen A.T.A., Soundy, A.A., Whole-Body Photobiomodulation Therapy Propels the Fibromyalgia Patient into the Recomposition Phase: A Reflexive Thematic Analysis. Behav. Sci. 2024, 12, 1116. 
 
Fitzmaurice B.C., Heneghan N.R., Rayen A.T.A., Grenfell R.L., Soundy, A.A., Whole-Body Photobiomodulation Therapy for Fibromyalgia: A Feasibility Trial. Behav. Sci. 2023, 13, 717. 
 
Fitzmaurice B., Heneghan N.R., Rayen A.T.A., et al. Whole-body photobiomodulation therapy for chronic pain: a protocol for a feasibility trial. BMJ Open 2022;12:e060058. 
 
Fitzmaurice B., and Rayen A.T.A., Treatments for neuropathic pain: up to date evidence and recommendations. BJA Education, 18(9): 277-283 (2018). 
 
Rogan A., Fitzmaurice B., Wong T., Rayen A.T.A., Why Do Patients Miss and Cancel Their Chronic Pain Management Appointments? The Internet Journal of Anesthesiology. 2015 Volume 34 Number 1. 
 
Raphael J., Palfrey S., Rayen A.T.A. et al., Stability and Analgesic Efficacy of Di-acetyl Morphine (Diamorphine) Compared with Morphine in Implanted Intrathecal Pumps In Vivo. Neuromodulation. 2004 Jul;7(3): 197-200. 

Fellow of the Higher Education Academy (FHEA), UK (2014) 
Postgraduate Certificate in Medical Education, Dundee University, UK (2014) 
Master of Science (MSc) in Pain Management, Leicester University, UK (2008) 
Foundation Fellow of the Faculty of Pain Medicine (FFPMRCA), Royal College of Anaesthetists, UK (2007) 
Fellow of the Royal College of Anaesthetists (FRCA), UK (1998) 
Diploma in Anaesthesia (DA), Royal College of Anaesthetists, UK (1997) 
Diploma in Anaesthesia (DA), Dr MGR Medical University, India (1994) 
Bachelor of Medicine, Bachelor of Surgery (MB BS), Madurai Kamaraj University, India (1991) 

– LinkedIn
– Managepain.co.uk
– PHIN

Foundation Fellow of the Faculty of Pain Medicine (FFPMRCA) 
Fellow of the Royal College of Anaesthetists (FRCA) 
MSc in Pain Management (University of Leicester) 
PGCert in Medical Education & Fellow of the Higher Education Academy 
Lead author/co-author of multiple peer-reviewed studies on PBM therapy and chronic pain 
Founder of nationally recognised training courses in regional anaesthesia and sedation 
Over a decade of high-volume medicolegal reporting for Claimants and Defendants 

Fibromyalgia 
Chronic pain (pain lasting more than 3 months) after any operations  
 
Head and Neck: 
Chronic headache including migraine not responding to medical treatments 
Persistent pain in face after Herpes (Post Herpetic Neurology) 
Any chronic post-surgical pain (pain persisting after any operation lasting more than 6 months) 
Chronic neck pain with or without radiculopathy | Chronic muscular pain in the neck muscles 
Trigeminal Neuralgia | Any neuropathic pain 
 
Shoulder and upper limb 
Chronic shoulder pain – OA, post-surgical, pain with inoperable shoulder problem 
Chronic muscular pain in shoulder muscles | Post Herpetic Neurology pain in hand (rare) 
Any chronic post-surgical pain (pain persisting after any operation lasting more than 6 months) 
Any radicular pain with or without neck pain 
Neuropathic pain following radiotherapy and chemotherapy 
Any neuropathic pain | CRPS (Complex Regional Pain Syndrome) 
 
Elbow and Hand: 
Injection for Tennis elbow 
Injection for Golfer’s elbow 
Peripheral nerve blocks 
 
Thorax and Chest: 
Degenerative thoracic pain | Facet pain | Chronic muscular pain 
Post Herpetic Neurology pain in thoracic dermatomes 
Any chronic post-surgical pain (pain persisting after any operation lasting more than 6 months) 
Chronic pain following breast surgery, chemo and radiotherapy 
Any radicular pain with or without back pain 
Chronic chest pain (after ruling out cardiac causes) | Costochondritis 
 
Abdomen and Pelvis 
Chronic abdominal pain |Chronic abdominal pain after surgery 
Chronic Pelvic pain | Chronic abdominal scar pain 
Chronic pain following hernia operation 
Chronic pain following vasectomy 
Perineal pain 
 
Low back (lumbar): 
Degenerative low back pain 
Low back pain with sciatica | Facet pain | Pain from sacroiliac joints 
Chronic muscular pain | Any chronic post-surgical pain (more than 6 months) 
Failed back syndrome | Psoas dysfunction 
Any radicular pain with or without back pain 
Sacral pain | Coccydynia | Piriformis syndrome 
 
Hip: 
Pain 2nday to OA hip 
Greater trochanteric bursitis 
Any chronic post-surgical pain (more than 6 months) 
Ischial bursa injection 
 
Knee: 
Pain 2ndary to OA knee 
Any chronic post-surgical pain (more than 6 months) 
 
Ankle and foot: 
Plantar fasciitis 
 
Procedures covered: [insert here] 
Head and Neck: 
Greater Occipital nerve block 
Supraorbital and trochlear nerve block 
Trigger point injections 
Cervical facet joint injections 
facet median nerve block 
Cervical root sleeve block | Stellate ganglion block 
Brachial plexus block – interscalene block 
 
Shoulder: 
Intraarticular shoulder injection 
Bursa injections | Suprascapular nerve block 
Suprascapular nerve pulsed radiofrequency ablation (denervation) 
Axillary nerve block | Trigger point injection 
 
Elbow and Hand: 
Injection for Tennis elbow 
Injection for Golfer’s elbow 
Peripheral nerve blocks 
 
Elbow and Hand: 
Injection for Tennis elbow 
Injection for Golfer’s elbow 
Peripheral nerve blocks 
 
Abdomen 
Abdomiocutaneous nerve block | Rectus sheath block 
Trans abdominal plane block | Trigger point injection 
Inguinal nerve block (Ileoinguinal and ileohypogastric nerve block) 
Genitofemoral nerve block | Quadratus lumborum injection 
 
Low back (lumbar): 
Lumbar Epidural | Caudal epidural | Lumbar facet injection | Lumbar facet denervation 
Lumbar tranforaminal epidural (root sleeve injection) | Lumbar dorsal root ganglion block 
Lumbar selective nerve root block | Iliolumbar ligament injection | Cuneal nerve block 
Sacroiliac joint injection | Sacroiliac cooled denervation | Lumbar sympathetic block 
Ganglion impar block | Sacroiliac cooled denervation | Lumbar sympathetic ablation 
Coccygeal infiltration Sacral nerve root block | Pudental nerve block 
Trigger point injection with local steroid | Trigger point injection with botulinum toxin 
 
Hip: 
Hip joint injection 
Greater trochanteric bursitis 
Ischial bursitis 
 
Knee: 
Knee pain due to arthritis 
Chronic Post-Surgical pain around knee 
 
Ankle and foot: 
Knee pain due to arthritis 
Plantar fasciitis