Differential Diagnosis for Numb Feet
- Single most likely diagnosis
- Peripheral Neuropathy: This condition is characterized by numbness, especially in the feet, which can be exacerbated by weight-bearing activities. The nighttime swelling and cramps could be related to poor circulation or nerve damage, common in peripheral neuropathy.
- Other Likely diagnoses
- Morton's Neuroma: A condition that causes numbness and discomfort in the feet, particularly between the toes, which can worsen with weight-bearing activities.
- Tarsal Tunnel Syndrome: Similar to carpal tunnel syndrome but affects the feet, causing numbness, tingling, and pain, especially at night or after periods of inactivity.
- Plantar Fasciitis: While primarily causing pain, it can lead to numbness if the inflammation affects nearby nerves. The discomfort typically worsens with weight-bearing activities.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Deep Vein Thrombosis (DVT): Although the primary symptom is swelling, DVT can cause numbness and cramping, especially if the clot affects blood flow significantly. It's a medical emergency if it breaks loose and travels to the lungs.
- Compartment Syndrome: A condition where pressure within the muscles builds to dangerous levels, reducing blood flow. It can cause numbness, pain (especially on palpation), and swelling, which are exacerbated by activity.
- Diabetic Foot: In diabetic patients, numbness can be a sign of neuropathy, but it's crucial to check for ulcers or infections, which can be deadly if not treated promptly.
- Rare diagnoses
- Charcot-Marie-Tooth Disease: A group of inherited disorders that affect the peripheral nerves, leading to numbness, muscle weakness, and atrophy, primarily in the feet and legs.
- Erythromelalgia: A disorder that causes burning pain, heat, and redness in the hands and feet, which can also lead to numbness and swelling, particularly at night.
- Peripheral Artery Disease (PAD): While more common in the legs as a whole, PAD can cause cramping, numbness, and swelling in the feet due to reduced blood flow, especially during activity.