This list of common outdoor health problems includes preventative measures and remedies recommended by the NOLS Wilderness Medicine Institute. Our goal: help you stay healthy when you’re out enjoying nature.
Remedy: If you do get burned, soothe damaged areas with an aloe-based skin cream. Keep these areas covered for the remainder of your trip (either with clothing or a strong sunscreen) to avoid further damage. If the sunburn is serious and you experience persistent nausea, chills or fever, seek professional medical attention.
For more information, see the REI Expert Advice article, Sunscreen: How to Choose.
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One blister, the product of friction that rubs skin back and forth in a concentrated area, can mar an otherwise wonderful hiking trip.
Prevention: Blisters are easier to avoid than they are to fix. Make sure you start every trip with footwear that is broken in and fits you well. Wear clean, properly sized socks. Also, consider wearing 2 pairs of socks—a lightweight wicking liner and a thicker cushioning sock—to lessen the chance of abrasion.
Tip: On the trail, address foot discomfort as soon as it develops. A quick response can often stop a blister before it becomes serious. At the first sign of irritation, put a small patch of protective material—moleskin, 2nd Skin or even duct tape—over the affected area to minimize abrasion.
Remedy: If you know you are prone to blisters, consider applying moleskin to your typical "blister zone" before you hit the trail.
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Sore muscles, headaches and joint pain are a common occurrence on more strenuous outings.
Prevention: The primary purpose of stretching before an aerobic activity is to increase body temperature. This increases blood flow so muscles can endure more force.
Tip: Avoid the temptation to exceed your physical limits, especially early in your activity’s season.
Remedy: Most muscle aches can be fixed with a little rest and gentle massage. For headaches, take a couple of pain reliever tablets—aspirin, ibuprofen or acetaminophen—and a short rest. Joint pain is typically caused by overuse, though it can be the result of twists or unusual compressions. Again, rest is usually the best remedy. Elevating the sore joint might help alleviate pain. Taking glucosamine, a cartilage-repairing nutritional supplement, can also help joint pain and expand your range of motion.
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In most areas of the country, it is possible to run into one or more of these troublesome plants.
Prevention: Learn how to recognize any dangerous plants that are common in the area you'll be exploring. Poison oak and ivy leaves grow in clusters of 3, so remember the old adage: If you see "leaves of 3, let it be." Be wary of touching anything foreign to you. Keep in mind that the oily, rash-causing resin found in poison oak and ivy—urushiol—remains present in the plants even during dormant winter months. Contact with a leafless stem in January can still spawn an itchy rash. Pre-exposure lotion can be helpful. If traveling in unfamiliar territory, consider carrying a lightweight, compact field guide to help you recognize plants.
Remedy: Carry a small supply of hydrocortisone cream or another soothing, anti-inflammatory lotion to lessen the discomfort caused by skin irritations. Fluid from a rash-induced blister will not spread the rash. However, if the resin is not cleaned from clothing, boots, skin or tools, you can re-expose yourself or another person. It's the resin, not the rash, that spreads infection. A good first-aid manual will provide other useful tips on limiting the spread of rashes.
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Clothing treated with permethrin, an EPA-registered chemical insecticide in use for decades, offers another effective line of defense. You can self-apply permethrin to your clothes or wear pre-infused garments from ExOfficio and others.
Remedy: First-aid products such as After Bite help relieve the swelling and itching caused by bug bites.
Tip: Some people are allergic to certain insect stings. If you are, protect yourself by avoiding risky situations as much as possible and by carrying whatever medicines you need to counteract the reactions. Make sure everyone in your group knows about your allergy and what to do if you get stung or bit.
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Bees, wasps, hornets and yellowjackets are additional winged threats you may encounter.
Prevention: If you come upon a beehive or wasps' nest, leave the area quickly and quietly. In campgrounds, avoid brightly colored clothing, shiny jewelry or belt buckles, and scented cosmetics. If you or someone in your group is allergic to bee or wasp stings, make sure to visit a health care professional for preventative injections.
Remedy: For a normal reaction to a sting (itching, redness and slight swelling) the following first-aid items may be useful: ice, baking soda, oral antihistamines (such as Benadryl, Chlortrimeton and Dimetane), epinephrine inhaler (such as Primatene), topical steroids (such as Cortaid or Lanacort) and local anesthetics (such as Benzocaine, Lanacane or Solarcaine).
Ticks are nasty little arachnid bugs that can make you sick. While not all tick bites transmit Lyme disease or tick fever, it pays to be aware of these threats. Check with rangers about potential danger before you explore an area unfamiliar to you.
Prevention: Avoid areas where ticks are prevalent such as vegetated areas (woods and grasslands) where small mammals live. Tuck in your clothing—shirts into pants, pants into socks. Do twice-daily checks of your skin and hair for ticks. DEET-based insect repellents on your skin and permethrin-based insect repellents applied to clothing can repel or kill some ticks.
Remedy: If a tick is discovered, try to remove it as soon as possible. Using tweezers, gently grasp the tick by the head and lift it straight up and out. Wash the bite site thoroughly with soap and water, rubbing alcohol or iodine. Avoid Vaseline smothering, gasoline dousing, matchhead burning and other discredited folk remedies.
Note: Ticks can only pass on their diseases if they are burrowed in your skin. Touching a tick or having one merely crawl on your skin is not dangerous.
While many snakes are harmless, a few (rattlesnake, coral snake, water moccasin and copperhead) have potentially lethal bites. Per the University of Maryland Medical Center, up to 8,000 people receive venomous snake bites each year in the U.S. (about a dozen or less typically prove fatal).
Prevention: Avoid areas prone to snakes by checking your guidebook or asking a local ranger or guide for advice. Stay on trails or in well-groomed, open areas. Watch where you're going and listen. Be cautious and alert when climbing rocks. If you see a snake, don't antagonize it.
Remedy: Never attempt to identify, capture or kill a snake, as this can easily result in a second bite victim. Follow these steps:
Avoid unproven or discredited treatments that may harm the patient, such as tourniquets, ice, electricity, meat tenderizer, incision and suction.
For more information, see this REI Blog post entry, Humans vs. Rattlesnakes.
Hantavirus is spread by the droppings, urine and saliva of contaminated rodents, particularly the deer mouse, cotton rat, rice rat and white-footed mouse. Inhaling fumes or dust that carries traces of rodent excreta is the most likely way humans are exposed to the virus. This usually happens during activities such as cleaning a barn or cabin, but campers are potentially at some risk, too.
As pointed out by Dr. Paul Auerbach, author of the respected book Medicine for the Outdoors, a person infected by the virus has an incubation period of 1 to 5 weeks following exposure. Symptoms include fever, muscle aches, headache, cough, dizziness, abdominal pain, nausea and vomiting, and diarrhea for a few days. This is followed by difficulty breathing, mottled skin on the limbs, shock and, sometimes, bleeding. Up to 75% of victims, he reports, may die.
Prevention: Avoid any areas with excessive rodent activity: barns, old cabins or dusty, enclosed trail shelters. Dr. Auerbach recommends the following precautions:
Remedy: If you suspect that you or someone in your party has been infected with hantavirus, seek professional health care immediately. Dr. Auerbach points out that there is not yet any specific therapy beyond supportive care, although the antiviral agent ribavirin may prove useful.
Altitude sickness (or “acute mountain sickness”) can affect wilderness explorers when traveling at high elevations (often above 8,000 feet or 2,400 meters). It is caused by the combination of reduced air pressure and lower oxygen levels. How fast you climb to a high altitude and how hard you push yourself can increase the odds of an occurrence.
Symptoms include a sluggish sensation often accompanied by a headache, dizziness, nausea, loss of appetite, elevated heart rate and shortness of breath with exertion. In most cases, symptoms are mild, but acute cases can be debilitating, even fatal.
Prevention: Avoid abruptly changing elevations from day to day. If you're spending your pre-hike day in a low-lying valley, you could be asking for trouble if you take aim at a 10,000-foot pass the next day. It is better to acclimatize, meaning you gain elevation gradually, or camp at a high elevation for a day or more before undertaking your hike. A general rule: Stop for a day or 2 of rest for every 2,000 feet gained above 8,000 feet high. If you do plan to climb fast, ask your doctor about acetazolamide (Diamox), a drug that can help your body acclimatize more quickly.
Remedy: Descend. If you sense the symptoms are overtaking you, seek out lower elevation quickly before your condition deteriorates and you are unable to walk unassisted. Aspirin can be beneficial for any head pain you experience. Call for emergency help if the victim has severe breathing problems, an altered state of alertness or is coughing up blood.
For more information, see this REI Blog post entry, A Good Head for Heights.
By T.D. Wood
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Last updated: 02/18/2014
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