Hiking - Hiking may produce threats to personal safety. These threats can be dangerous circumstances while hiking and/or specific accidents or ailments. Dangerous hiking circumstances include losing the way, inclement weather, hazardous terrain, or exacerbation of pre-existing medical conditions. Specific accidents include metabolic imbalances (such as dehydration or hypothermia), topical injuries (such as frostbite or sunburn), attacks by animals, or internal injuries (such as ankle sprain).