Osteoarthritis is caused by a thinning of the protective layer of « cartilage » between the connecting bones in the joint. When the cartilage is too thin, the joint becomes inflamed and swollen and the bones will rub together, causing pain. You might also experience a grinding feeling, or even a sound in the affected joint, muscle weakness, tenderness and restricted movement of the joint.
If you are experiencing knee osteoarthritis, the symptoms you will most likely develop in both knees over time. The pain associated with knee osteoarthritis is usually more intense when you are walking, therefore adding pressure to the affected area. Going “up” stairs and inclines can be especially tough on the knees.
Osteoarthritis in the hips can be quite severe, since the hips control many of our regular movements. Bending over or lifting your knee upwards can become very difficult and painful. As with knee osteoarthritis, walking usually causes the most pain.
You may also experience osteoarthritis in your spine. Usually the symptoms appear in the more flexible parts of the spine; the neck and lower back. The main symptoms in the neck are pain from stiffness, spasms and difficulties turning your head. If the lower part of the spine is affected, symptoms may be manifested by pain if you are lifting and bending. The pain may go down all the way to the hips and legs.
It is quite common to experience osteoarthritis in your hands. You may have stiff and swollen fingers, accompanied by pain. Some patients experience a decrease in pain over time, but the fingers can remain swollen.
Source: UK National Health Service