Foot drop makes it difficult to lift the front part of the foot, so it might drag on the floor when you walk. To help the foot clear the floor, a person with foot drop may raise the thigh more than usual when walking, as though climbing stairs. This unusual kind of walking, called steppage gait, might cause the foot to slap down onto the floor with each step. In some cases, the skin on the top of the foot and toes feels numb. Depending on the cause, foot drop can affect one or both feet.