1. The cause of the injury was most likely form from a constant over use while hyper extending the great toe. Most likely I would assume that the individual had a case of turf toe. In terms of how I would manage it, I would use ice therapy, NSAIDs, rest and I'd make sure to immobilize the joint form excessive motion. A metatarsal pad under the first metatarsal might be implemented too in order to relieve stress. If I saw that it was a severe injury, I would most likely restrict his playing until the symptoms disappear.
             2. One of the first questions that I would ask the individual would be "did you hear or feel a pop when you injured your foot?" Next, I would check for a visible defect in the tendon, inability to stand on tiptoes or even balance on the affected leg, swelling and bruising around the malleoli, excessive passive dorsiflexion, and a positive Thompson's test. If there was no real positive testing to these things, I would move on to check for a large amount of inflammation, and see if there was any loss of ROM. For bursitis, the severity would naturally be concurrent with the amount of swelling that was occurring. For an Achilles tendon injury, the severity of the injury can be shown in concurrency with the amount of pain one feels in the leg, and any sort of visual deformities seen. Also, the less an individual can dorsiflex their foot, the greater the severity. The injury naturally would be treated with NSAIDs, RICE, and restricted playing until the symptoms disappear.
             3. Tinea pedis (athlete's foot) would be the suspected condition, and it is usually spread in the locker room during casual handling of contaminated socks, or can be picked up by another player on the floor or shower stall. Basically the best way of treating it would be to use some Tinactin and change socks regularly along with making sure the foot is properly ventilated
             4. Contusion would simply be a darkened area ...