The fat pad under the heel protects the foot by providing cushioning and shock absorption. A problem can arise if that fat pad atrophies and it can result in heel pain.
Most Useful Resources:
Heel fat pad atrophy (Foot Health Forum)
heel pad atrophy HELP (Foot Health Forum)
Fat pad atrophy (PodiaPaedia)
Heel Fat Pad Atrophy (Foot Health Friday)
Heel Fat Pad Atrophy Cushioning Pad (FootStore)
Fat Pad Atrophy (Croydon Foot)