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.
The original Ontario County existed from 1792 to 1800 as part of the Eastern District, and consisted of the islands in the St. Lawrence River. After 1800, Ontario County was dissolved and the islands were reassigned to the nearest mainland counties: Lennox and Addington.