Symptoms of plantar warts gradually getting better include the following. First, the plantar warts slowly flatten and thin out, and the pain becomes less and less severe. Second, the color is getting lighter and lighter, and the wounds in the affected area are getting smaller and smaller, and the natural texture of the skin is slowly growing. Thirdly, if the deeper muscles are affected, in this case there may also be localized redness of the skin on the soles of the feet and an expansion of the rash, which are all signs of improvement.