Rest your wrist to give it time to heal. You may find that, depending on the severity of the sprain, immobilization through a soft cast is necessary. If your sprain is the result of a sports injury, you should stop playing the sport immediately, at least for a few weeks while your wrist heals.
Water also has a high level of surface tension. This means that the molecules on the surface of the water are not surrounded by similar molecules on all sides, so they're being pulled only by cohesion from other molecules deep inside. These molecules cohere to each other strongly but adhere to the other medium weakly.
1 This is the basis of capillary action, where water can move up a thin capillary, against the force of gravity. Surface tension pulls neighboring water molecules along.  The liquid climbs until the adhesive and cohesive forces are balance by the force of gravity.