Los pies informan sobre calor, frío, presión, dolor y juguetes olvidados. La neuropatía periférica daña los nervios que llevan esos mensajes al cerebro.

Puede causar ardor, hormigueo, descargas, sensibilidad, debilidad o adormecimiento. La diabetes es frecuente, pero también influyen deficiencias vitamínicas, enfermedades renales o tiroideas, alcohol, medicamentos, quimioterapia, trastornos autoinmunes, infecciones, compresión nerviosa, enfermedades hereditarias y lesiones. A veces no se encuentra una causa.

El mayor peligro quizá no sea el dolor. Una persona que no siente una ampolla, un objeto afilado, una superficie caliente o un zapato apretado puede seguir caminando sobre la lesión. Un problema puede convertirse en úlcera o infección antes de notarse.

Neuropathy often develops gradually. Symptoms may begin in the toes, affect both feet, and creep upward over months or years. People may blame aging, poor circulation, uncomfortable shoes, or “sleeping wrong.”

Symptoms can also be confusing. Some feet hurt intensely while others feel almost nothing. A light bedsheet may feel painfully heavy, yet the same person may not notice a cut. Balance problems may be mistaken for clumsiness. Weakness may be blamed on being out of shape.

Symptoms alone do not establish the diagnosis. A clinician may review medicines, nutrition, diabetes risk, family history, and illnesses; examine strength, reflexes, skin, pulses, and sensation; and order tests. Finding the cause matters because some causes are treatable.

Sensory symptoms include numbness, pins and needles, burning, stabbing pain, electric sensations, or increased sensitivity to touch. Some people lose the ability to feel temperature or know where their feet are positioned.

Motor nerve damage may cause weakness, cramps, toe deformities, difficulty lifting the front of the foot, tripping, or an unsteady gait. Autonomic nerve damage can reduce normal sweating, leaving skin dry and more likely to crack.

Symptoms often begin in a “stocking” pattern in both feet, but one nerve or side may be affected. Sudden or rapidly progressive symptoms require prompt assessment.

Seek urgent medical care for a foot wound with spreading redness, warmth, swelling, drainage, bad odor, fever, or increasing discoloration. A black, blue, pale, or cold toe or foot may signal impaired blood flow.
A red, hot, swollen foot—especially when there is surprisingly little pain in someone with neuropathy—could be an infection or Charcot foot, a condition in which weakened bones and joints become damaged. Do not keep walking on it while waiting to see what happens.
New foot drop, rapidly worsening weakness, sudden one-sided numbness, severe back pain with new bladder or bowel problems, or weakness moving upward through the legs requires urgent evaluation. Call 911 for stroke symptoms, breathing difficulty, or rapidly spreading paralysis.

Management begins with finding and treating the cause when possible. For people with diabetes, glucose, blood pressure, and cholesterol management can reduce complications. Medicines may ease nerve pain, but pain treatment does not restore lost sensation. Supplements help only when a true deficiency exists; megadoses can sometimes cause harm.

Inspect both feet every day, including the soles and between the toes. Use a mirror or ask for help if needed. Look for blisters, cuts, redness, swelling, cracks, drainage, or color change. Wash in warm—not hot—water, dry carefully, and moisturize dry skin while avoiding lotion between the toes.

Never test bath water with a numb foot; use a hand or thermometer. Avoid heating pads and hot-water bottles on areas with reduced sensation. Do not walk barefoot, even indoors. Shake out shoes before putting them on and wear clean socks and properly fitted footwear.

Trim nails straight across and file sharp edges. People with poor vision, thick nails, circulation problems, previous ulcers, or significant numbness may need professional nail and callus care. Never cut corns or calluses with blades or use medicated removers without guidance.

Movement, smoking cessation, nutritious food, and limiting alcohol support nerve and vascular health. Feet need regular professional examination, especially when sensation, circulation, deformity, or wounds are concerns.