1 Pain or tenderness of your jaw. 2  Pain in one or both of the temporomandibular joints. 3  Aching pain in and around your ear. 4  Difficulty chewing or pain while chewing. 5  Aching facial pain.  Locking of the joint, making it difficult to open or close your mouth.
For a broader usage of the name, see American football (disambiguation). American football, referred to as football in the United States and Canada, and also known as gridiron football or simply gridiron, is a sport played by two teams of eleven players on a rectangular field with goalposts at each end.
The main types of football are association football, American football, Canadian football, Australian rules football, Gaelic football, rugby league, and rugby union. It has been estimated that there are 250 million association football players in the world, and many play the other forms of football.