a Diabetic neuropathy
Nerve damage from long-standing diabetes, usually in both feet first. Treatment: blood sugar control with your diabetologist, medication for nerve pain, foot care to prevent ulcers, and in selected cases ultrasound-guided perineural PRP injection around the affected nerves, which is offered with clear expectations as an emerging treatment.
b Post-herpetic neuralgia
Pain persisting after shingles along the same skin band, often severe to light touch. Early antiviral treatment of shingles reduces the risk. Established pain: medication, topical agents, and nerve blocks — intercostal or paravertebral for the trunk, occipital or trigeminal branches for the head.
e Complex regional pain syndrome (CRPS)
Severe, disproportionate pain in a limb after injury or surgery, with swelling, colour and temperature change and extreme sensitivity. Early diagnosis is critical. Treatment combines medication, active physiotherapy and sympathetic nerve blocks — stellate ganglion for the arm, lumbar sympathetic for the leg — to allow rehabilitation.