Even a cut that will need stitches will bleed less and swell less if an ice pack is applied while waiting for treatment. Wash thoroughly with soap and water. Keep it elevated and stay off it. Minor fractures will even heal fine if this rule is applied. And don t forget to update your tetanus shot if you have not already done so.
Rashes are another bugaboo of travel.
Diagnosis will often have to wait until you get home, but an antihistamine like Benadryl will often keep the itching down until then. Insect bites need to be kept clean but will also itch less with antihistamines. Remember that a lot of medications common to travelers will sensitize the skin to the sun so be careful with sun exposure and use a sunscreen. Often quite itchy and long-lasting but harmless and it responds well to Benadryl. When flying, therefore, ask for an aisle seat, drink plenty of water or juice and make frequent bathroom trips.