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Skin Conditions That Alter Tactile Sensation: From Dermatitis to Neuropathy

The skin is the primary tactile organ. Numerous dermatologic and neurologic conditions impair touch, temperature, pain, or proprioception.

Primary Dermatologic Conditions Affecting Touch

  1. Atopic Dermatitis (Eczema) – Barrier defect → dryness, fissuring, lichenification; chronic itch alters scratch‑induced neuroplasticity.
  2. Contact Dermatitis (Allergic/Irritant) – Acute inflammation → hypersensitivity, burning, tactile allodynia.
  3. Psoriasis – Thick plaques reduce mechanoreceptor access; Koebner phenomenon at trauma sites.
  4. Lichen Simplex Chronicus – Lichenified plaques from chronic scratching; hyper‑innervation → hyperesthesia.
  5. Burns & Scars – Destruction of Meissner's, Merkel, Ruffini, Pacinian corpuscles; contractures limit mobility.
  6. Scleroderma / Systemic Sclerosis – Fibrosis tethers skin, reduces compliance, digital ischemia → numbness, ulceration.

Neurologic / Systemic Conditions With Cutaneous Sensory Changes

  • Peripheral Neuropathy (diabetic, chemo‑induced, B12 deficiency) – Stocking‑glove numbness, paresthesia, allodynia.
  • Small Fiber Neuropathy – Burning pain, autonomic dysfunction; skin biopsy (IENFD) diagnostic.
  • Radiculopathy / Spinal Stenosis – Dermatomal sensory loss.
  • Complex Regional Pain Syndrome (CRPS) – Allodynia, hyperalgesia, vasomotor/trophic skin changes.
  • Postherpetic Neuralgia – Dermatomal pain, hypersensitivity after herpes zoster.

Conditions Listed in Source That Are Not Primarily Cutaneous

Note: The original list included tinnitus, Ménière's disease, otitis media, and sinusitis. These affect special senses (hearing, balance) or sinuses, not cutaneous tactile sensation. Alopecia areata affects hair follicles, not somatosensation directly.

Evaluation Approach

  • History: distribution, quality, triggers, timeline.
  • Exam: light touch, pinprick, temperature, vibration, two‑point discrimination.
  • Skin biopsy (IENFD), NCS/EMG, MRI, labs (glucose, B12, ANA) as indicated.

Referral: Dermatologist for primary skin disease; Neurologist for suspected neuropathy/radiculopathy.

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