Most nerve damage is preventable, and the strategies that matter most come down to controlling blood sugar, avoiding toxic exposures, getting the right nutrients, and protecting your body from repetitive physical stress. Peripheral neuropathy, the most common form of nerve damage, affects the long nerves running to your hands and feet first, which means early warning signs tend to show up there before anywhere else. Understanding what damages nerves and acting early gives you the best chance of keeping them healthy.
Control Blood Sugar Tightly
Diabetes is the single most common cause of peripheral neuropathy. Chronically elevated blood sugar damages the small blood vessels that supply oxygen to nerve fibers, and over time, those fibers die. This process is gradual, often unfolding over years before symptoms become obvious. About half of all people with diabetes will develop some degree of nerve damage during their lifetime.
If you have diabetes or prediabetes, keeping your blood sugar within your target range is the most powerful thing you can do to protect your nerves. That means consistent monitoring, staying on top of prescribed medications, maintaining a healthy weight, and building regular physical activity into your routine. Exercise improves blood flow to peripheral nerves and helps your body use insulin more efficiently. Even moderate daily walking makes a measurable difference in long-term nerve health.
Get Enough B12 (and More Than You Think)
Vitamin B12 is essential for maintaining the protective coating around your nerve fibers, called the myelin sheath. When B12 drops too low, that coating breaks down, and nerves misfire or stop working altogether. The symptoms can mimic other conditions: tingling in the hands and feet, balance problems, difficulty with coordination.
Here’s what’s surprising: the clinical cutoff for B12 deficiency is set at a serum level of 148 pmol/L, but research from a study published in Neurology found that nerve conduction speed and cognitive function were significantly better at levels around 390 to 410 pmol/L. That’s roughly 2.7 times higher than the standard deficiency threshold. In other words, your B12 levels can be “normal” on a lab report while still being too low for optimal nerve function, especially as you get older.
People most at risk for low B12 include those over 60 (absorption declines with age), vegetarians and vegans (B12 comes primarily from animal foods), and anyone taking long-term acid-reducing medications, which interfere with B12 absorption in the gut. If you fall into any of these categories, ask for a blood test and discuss supplementation.
Limit Alcohol Intake
Alcohol is directly toxic to nerve tissue. Heavy drinking over years to decades can cause alcohol-related neuropathy, a condition where nerves in the feet and legs (and eventually the hands) progressively deteriorate. The timeline varies from person to person based on how much you drink each day, your nutritional status, and your genetics.
Alcohol also depletes B vitamins, compounding the damage. There isn’t a universally “safe” threshold that guarantees you won’t develop nerve problems, but the risk rises substantially with sustained heavy drinking. Cutting back or stopping alcohol use can slow or halt further damage, though nerves that have already died won’t regenerate. If you drink regularly and notice numbness or burning in your feet, that’s a signal worth paying attention to immediately.
Protect Against Repetitive Compression
Compression neuropathies happen when a nerve gets pinched or squeezed repeatedly in the same spot. Carpal tunnel syndrome is the most familiar example: the median nerve running through your wrist gets compressed from repetitive hand and wrist motions, causing numbness, tingling, and eventually weakness in the hand.
If you work at a desk, your keyboard and mouse position matter more than most people realize. The Mayo Clinic recommends keeping your wrists in a neutral position while typing, not bending them all the way up or down. Your forearms should be roughly parallel to the floor, with your elbows at about a 90-degree angle. Take breaks every 30 to 60 minutes to stretch your hands and wrists, and if you notice tingling during specific activities, change your position right away rather than working through it.
Compression neuropathy isn’t limited to office work. Cyclists frequently develop ulnar nerve compression in the hands from gripping handlebars. People who cross their legs habitually can compress the peroneal nerve near the knee, causing foot drop. Sleeping in positions that pin your arm under your body can damage the radial nerve. The prevention principle is always the same: reduce sustained pressure on any single nerve, vary your position frequently, and use padding when necessary.
Watch for Medication Side Effects
Certain medications can damage nerves as a side effect, with chemotherapy drugs being the most well-known culprits. Chemotherapy-induced peripheral neuropathy affects a significant percentage of cancer patients, and unfortunately, there is currently no proven agent that prevents it. An updated guideline from the American Society of Clinical Oncology confirmed that no supplements or medications, including commonly suggested options like calcium-magnesium infusions and certain antioxidants, have demonstrated a preventive benefit in clinical trials.
If you’re undergoing chemotherapy, the most important thing you can do is report new tingling, numbness, or pain in your hands and feet to your oncologist immediately. Catching nerve symptoms early sometimes allows for dose adjustments that prevent further damage. Beyond chemo, other drugs linked to neuropathy include certain antibiotics (particularly fluoroquinolones), some heart medications, and anticonvulsants. Always ask your prescribing doctor about nerve-related side effects when starting a new long-term medication.
Consider Antioxidant Support
Oxidative stress, essentially an accumulation of damaging molecules your body can’t neutralize fast enough, plays a role in nerve deterioration, particularly in diabetic neuropathy. Alpha-lipoic acid (ALA) is the most studied antioxidant supplement for nerve protection. In clinical trials involving people with type 2 diabetes and symptomatic neuropathy, a loading dose of 1,800 mg per day (split into three doses) for four weeks followed by a maintenance dose of 600 mg daily for 16 weeks produced meaningful symptom improvement.
ALA is widely available over the counter and is generally well tolerated. It’s more commonly used in Europe than in the United States as a standard part of neuropathy management. If you have diabetes and early neuropathy symptoms, it’s worth discussing with your doctor, but it’s not a substitute for blood sugar control.
Recognize the Early Warning Signs
Nerve damage is easiest to slow or stop when caught early, and the first symptoms are easy to dismiss. Because peripheral nerves are the longest in your body, damage typically shows up in the feet first, then gradually moves upward toward the ankles and calves before affecting the hands. Doctors call this a “stocking-glove” pattern.
The earliest signs are often subtle. You might notice your feet feel slightly numb, like you’re wearing a thin sock even when barefoot. Tingling, burning sensations, or occasional sharp pains in the toes or soles are common. Some people lose their sense of balance in the dark, because the nerves that tell your brain where your feet are in space stop working properly. Clumsiness with your hands, dropping things more often, or difficulty with buttons and zippers can all be early motor nerve involvement.
Pain from nerve damage behaves differently than other types of pain. Nerves can begin sending pain signals spontaneously, or they can amplify normal touch into something painful. If light contact with bedsheets or socks causes discomfort, that’s a hallmark sign called allodynia, and it points specifically to nerve dysfunction rather than a muscle or joint problem.
Stay Physically Active
Regular exercise protects nerves through several overlapping mechanisms. It improves blood flow to the small vessels supplying peripheral nerves. It helps regulate blood sugar. It reduces chronic inflammation, which can damage nerve tissue over time. And it maintains the muscle strength and flexibility that prevent compression injuries.
You don’t need intense workouts. Walking, swimming, cycling, and yoga all support nerve health. The key is consistency. Aim for at least 150 minutes of moderate activity per week, and include some balance and flexibility work, which becomes increasingly important if you already have mild neuropathy symptoms. Exercise won’t reverse established nerve damage, but it can meaningfully slow progression and reduce pain severity.