There is a strange discomfort that can occur beneath the forefoot which is typically referred to as a sense that the sock is scrunched up under the toes, but if you checked it it is fine. The sense is frequently explained and it is typically confusing. Most probably the sensation is due to an issue with a ligament on the base of one or more of the metatarsophalangeal (toe) joints of the foot called plantar plate dysfunction. About each joint, there's a strong covering known as the joint capsule. Regions of each joint capsule are thicker which are the ligaments which protect and stabilise the joints. Below the bottom of the metatarsophalangeal joints, that joint capsule is thicker to make what is called the plantar plate. You possibly can strain or even get a minor tear in that plantar plate , which produces that sensation of a sock that feels like its scrunched up beneath the toes.
The symptoms usually begins gradually beneath the ball of the foot and can be preceded by that strange scrunched sock sensation. The typical manifestation of plantar plate dysfunction is discomfort on palpation of the area of the plantar plate. A competent clinician will move the joint in a way to detect if the plantar plate is injured. A conclusive diagnosis can be achieved with a diagnostic ultrasound, however it's really apparent to a experienced clinician on examination. Typically the initial treatment solutions are strapping to hold the toe pointing downwards to ease the pressure on the plantar plate. A metatarsal pad is also often used to help in reducing the strain on the plantar plate. This usually helps many cases of plantar plate dysfunction and get rid of that weird sensation of a scrunched up sock below the ball of the foot. If those conservative methods really don't help, surgical repair of a partial or complete split of the plantar plate is frequently undertaken.