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This squeezing action helps break up uric acid crystals that develop in the feet; breaking up these acid crystals helps increase circulation.  Tug just enough for the foot to move towards you an inch or so.    Use a gentle but firm motion. Start at the toes and use a slapping motion to tap the sole of the foot all the way down to the heel and back up to the toes again. Slap hard enough so the client can feel it, but that it doesn't sting the skin on your client's foot.  If your hands are large enough, you can massage the front and back of your client's lower leg at the same time.

Summary:
Grasp the heel of your client's left foot with your left hand and place your right hand over the top of the foot near the ankle. Gently squeeze the top and bottom of the foot. Place one of your hands over the top of your client's ankle and cup the heel in the palm of your other hand. Gently tug the client's foot and leg toward you. Place your right hand horizontally over the top of your client's foot and place your left hand vertically along the bottom of the foot. Press down on the top of the foot using your right hand, while pressing up against the sole of the foot with your left hand. Release the pressure and then repeat three more times. Use both your hands to squeeze and twist your client's foot using the same motion you would use to wring out a wet rag. Tap the soles of your client's feet with the back of your hand. Massage your client's leg starting at the ankle and continuing up the shin to the knee. Bring your hands back down to the foot by massaging the back of your client's leg starting from the back of his knee, continuing over his calf and back down to his ankle. Work the back of the leg with your fingers and the front of the leg with your thumbs. Apply pressure with your thumbs to the reflex points for the diaphragm on your client's left foot. Wrap the client's left foot in a towel to keep it warm while you repeat the relaxation massage process on his right foot. Begin your regular reflexology treatment session.