The skin of heel and calf is slack and wrinkled, which is actually the muscle relaxation of leg.

The improvement method is as follows:

Make a walking plan that you can bear, keep walking every day and exercise your muscles slowly.

When sitting and resting, you can massage your legs and stomach with your hands and beat them constantly, often forming a habit.

Eating more fruits and vegetables can increase the elasticity of the skin.

You can do some plastic surgery or inject collagen to fill it.