Quick Answer
Wear blisters that are large, deep, or show signs of infection should be treated as a medical emergency and seek help immediately. Otherwise, blisters that are painful, prevent movement, or become severely inflamed may also warrant medical attention.
Identifying Blister Severity
To determine the severity of a blister, assess its size, depth, and the presence of signs like redness, swelling, pus, or a foul odor. A general guideline is to seek medical help if the blister is over 3/4 inch (2 cm) in diameter, or if it’s deeper than 1/4 inch (6 mm). Additionally, watch for signs of infection, such as increased pain, redness, or swelling.
Treating Blisters in Survival Situations
When treating blisters in survival situations, clean the area with mild soap and water, and apply antibiotic ointment to prevent infection. Cover the blister with a breathable dressing or moleskin to protect it from further friction and irritation. Apply a topical pain reliever like capsaicin or menthol to reduce discomfort. If the blister becomes severely painful or inflamed, use the “walk it off” technique: walk slowly and carefully for a short distance to help the blister drain and reduce pressure.
Preventing Blisters in Survival Situations
Blisters can often be prevented by taking simple precautions, such as wearing proper fitting footwear, using moleskin or blister pads to shield high-friction areas, and keeping the feet dry and clean. Apply a topical lubricant like petroleum jelly or silicone spray to reduce friction and prevent blistering. For extended hikes or backpacking trips, change socks regularly to prevent moisture buildup and blistering.
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