Plantar Hyperhidrosis, severe sweating of the feet, usually occurs in conjunction with Palmar Hyperhidrosis, hand sweating, as a result of an overactive sympathetic nervous system. People with Plantar Hyperhidrosis complain of bad foot odor. The most common problems with Plantar Hyperhidrosis are athlete’s feet, blisters, infection and rotting of socks. Regular shoes must be purchased more frequently, because moisture ruins the shoes. It is almost impossible to wear sandals with this condition. The sweat makes the feet slip and slide right out of the shoes! It can be uncomfortable and dangerous to drive, when the feet are sweating, profusely. The right foot can slip off the accelerator or brake pedal, resulting in the very real possibility of losing control and causing an accident.