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Wash the foot in warm water and soap and pat it dry before proceeding to step 2. Dirty or moist feet can invite fungi to grow and cause athlete’s foot. You can do this by keeping the toes pointing straight toward the ceiling. The feet have a natural tendency to point downward in a long-sitting position. Keeping the foot in a neutral position helps to prevent excessive stress on the ankle joint. Use pre-wrap tape to cover the skin from the mid foot to 3 inches (7.6 cm) above the ankle. A pre-wrap protects the skin from irritation or abrasion caused by athletic tape.  Starting at the mid-foot, wrap the pre-wrap around the foot, around the ankle and heel and up the leg until you reach a spot three inches above the ankle. Each strip of pre-wrap should overlap the previous strip by half. Don't worry if you miss a patch of skin around the heel as you wrap, this is not likely to cause any problems. Keep the pre-wrap tight, and try to use as little as possible. Take the athletic tape and wrap it around the top edge of the pre-wrap (just under the calf muscle) three times, moving downwards. This forms the anchor and helps to keep the tape in place during movements.  Make sure that each layer of tape covers 50% of the previous layer. This helps to keep the anchor stable. The tape should be snug but not tight. You shouldn't feel any pulling pressure on the leg as you apply the tape. Attach a strip of tape to the anchor on the outer side of the leg. Pull the tape downwards towards the foot and wrap it around the sole of the foot. Attach the other end of the strip to the anchor on the inner side of the leg. This serves as a stirrup.  Do this twice more, to make a total of three stirrups. The stirrups should be side by side, not overlapping each other. The stirrups are necessary as they prevent the ankle from moving outwards, keeping it stable and preventing further injury. Using athletes tape to lock the heels keeps the foot in a neutral position and reduces the risk of aggravating the sprain. Here's how to do it:  Place a strip of tape at the front of the leg, towards the lower part of the shin bone. Pull the tape diagonally downwards toward the inside of the leg and wrap it around the back of the heel. Pass the tape under the sole of your foot (in front of the heel) and pull it back up over the instep until you reach the ankle on the opposite side. Do the same thing again, this time starting on the opposite side of the ankle. This balances the pull of the heel locks and prevents injury from both sides. To close any gaps in the bandage (where the pre-wrap is exposed), start wrapping strips of tape around the foot, starting at the bottom of the pre-wrap, near the toes. Each strip should start and end at the top of the foot (not on the sole, as this could cause blisters).  Once you have finished covering the gaps on the foot, you can continue to wrap the athletic tape around the rest of the ankle and leg, using the same strip-by-strip technique. Make sure the pre-wrap is entirely covered in the athletic tape — any gaps will serve as a weak point and potentially cause the tape to unravel. There should be minimal pulling pressure applied on the tape. The goal is only to cover the gaps, not to compress the foot with tape. Repeat the process described above for making a heel lock, but this time use a stronger tape, such as Leukotape. This reinforces the neutral position of the ankle, even during physical activity, If the bandage is wrapped too tightly it can cut off the blood supply and become uncomfortable.  Check the nails for blood supply. Press on the nails and release. You should be able to see the nails return to pinkish color in less than two seconds. If it takes more than two seconds for the nails to turn pink, the taping is too tight. Numbness or loss of feeling is a sign that there is inadequate blood flow to the foot. A tight tape can compress the blood vessels of the foot and cause numbness. If the taping is too tight, you will need to undo it and wrap the ankle again.

Summary:
Make sure the foot is clean. Keep the injured foot in a neutral position. Apply pre-wrap tape to protect the skin. Apply the anchors to hold the tape in place. Apply the stirrups to stabilize the ankle. Lock the heels to keep the foot in a neutral position. Close the gaps. Apply a second heel lock over the taped foot. Make sure the ankle isn't wrapped too tightly.