There are few reasons for foot pains like inflammation of the extensor tendons, plantar fascia strain, calcaneal pain, metatarsal fracture and nerve entrapment. The basic symptoms for a plantar fascia strain are a nodule or lump in the plantar fascia, pain while walking and tenderness over the plantar fascia. Inflammation of the extensor tendons is basically caused due to the overuse of the tendons in foot. According to the description provided by you it looks like an inflammation of the extensor tendons. A good massager can help you get rid of many foot problems; I would recommend OSIM uSqueez warm, a leg massager with inbuilt foot rollers that delivers a foot reflexology massage that stimulates all the vital acupressure points and keeps you away from problems like inflammation of the extensor tendons. Warm air massage improves blood circulation to reduce chances of nerve entrapment and relieves plantar fascia strain.