On a mountain trek, you are your own first responder. Help can be hours, sometimes days, away, so a well-chosen first-aid kit is not optional luggage but essential safety gear. Building one is straightforward: cover the likely problems, keep it light, and know how to use everything in it before you need it.
Wound care and blisters
Blisters and small cuts are the commonest trail injuries, so give them the most space in your kit. Pack assorted adhesive dressings, blister-specific plasters, medical tape, gauze pads and an antiseptic for cleaning wounds. Add tweezers for splinters and ticks, small scissors and safety pins. Clean every break in the skin promptly; even a small graze can become a serious infection far from medical care. Change dressings daily or whenever they get wet or dirty.
Strains, sprains and pain
Twisted ankles and sore joints are the next most likely trouble. An elastic bandage supports sprains and holds dressings in place, while painkillers and anti-inflammatory tablets handle headaches, muscle pain and mild altitude headaches; check with your doctor or pharmacist about what suits you before the trip. Include any personal prescription medication with a comfortable surplus, plus antihistamines for stings and allergic reactions. A small emergency blanket weighs almost nothing and is invaluable for keeping an injured person warm while waiting for help.
Stomach, hydration and altitude
Digestive trouble is common at altitude and in new food environments. Oral rehydration salts are the single most important item here; dehydration from vomiting or diarrhoea becomes dangerous quickly in the mountains. Add anti-diarrhoea tablets for the walk out, and any medication your doctor recommends for your destination. If your route goes high, discuss altitude medication with your doctor beforehand, and remember that no tablet replaces the golden rules: ascend gradually, and descend if symptoms worsen.
Pack it, learn it, check it
A kit you cannot find or use is dead weight. Pack everything in a waterproof, clearly marked pouch kept near the top of your bag, and make sure your companions know where it is. Take a basic first-aid course before a serious trek; knowing how to clean a wound, immobilise a sprain and recognise serious illness matters more than any gadget. Check expiry dates and restock before every trip, replacing anything used, damp or out of date.
A first-aid kit is a promise to yourself: that a blister, a sprain or a bad stomach will be an inconvenience, not an emergency. Build it carefully, learn it properly, and hope you barely use it.