Knee pain is a very common symptom prevalent among not only the elders but also the younger ones. Arthritis is the most common cause of knee pain. There are two types of knee arthritis such as osteoarthritis and rheumatoid arthritis. Osteoarthritis is a degenerative condition, otherwise called wear-and-tear arthritis. The cartilage gives a cushion-like effect between the bone joints. In osteoarthritis, wear and tear activities remove the cartilage gradually. Hence, joint bones run against each other, which leads to knee pain. In rheumatoid arthritis, the immune system attacks itself by damaging the cartilage. As and when the knee pain becomes severe, the muscles around the affected knee portion weaken. Hence, this condition leads to joint deformity where the knee shape may point inwards or outwards. Knee arthritis not only causes pain. It is also accompanied by other symptoms like tenderness, limited range of motion, stiffness, swelling, warmth sensation and cracking noise, especi...