Pain behind the Knees â Causes, Risk Factors and Treatment. An injury or blow to the back of the leg due to a fall or some other accident may lead to considerable pain in the posterior knee region. A sprain may lead to considerable pain, that may be accompanied by redness and swelling.
Ontario is a Province in Canada. There are no US states by that name. There is Ontario California stateside. Valerie Lee.
Ontario (ÅntÃ¢rÂ´ÄÅ), province (2001 pop. 11,410,046), 412,582 sq mi (1,068,587 sq km), E central Canada. Land and People. Ontario, the second largest Canadian province, is the most populous and the leader in mineral, industrial, and agricultural output and in financial and other services.