First aid and medical issues are beyond the realm of this
website. You owe it to yourself (and others you hike with or meet on the
trail) to learn some basic first aid techniques like dealing with shock, hypothermia,
snake bites, and dehydration. NOLS teaches the standard in wilderness first
aid. If you can't make it to a class, check out their book, Wilderness
First Aid, by Tod Schimelpfenig and Linda Lindsey (order
this book from Amazon.com).