From Yogamint :-)

The shape of your ear forms a perfect replica of your body as an infant in a fetal position. Your earlobe connects to your heart, the inner ridge is your spine and the points inside the ridge correspond with the inner organs. Ear massage employs some simple acupressure techniques, known to increase energy and mental focus, aid in pain relief, reduce substance cravings and support detoxification.

To massage, simply use gentle to firm pressure with your index finger and thumb on one ear, starting at the earlobe and working your way up. Spend 4-6 seconds at each point. Move in small increments, giving a little extra attention to any particularly sensitive areas. Breathe slowly and deeply. Close your eyes and visualize sending healing energy to each body part. Take a few deep breaths and continue with the other ear. Every cell will thank you.