Introduction Tuberculosis (TB) is an illness caused by a bacterial infection. It commonly affects your lungs, but it can also affect other areas of your body like your spine, brain or…

Introduction Sinusitis is a disease characterised by inflammation, or swelling, of the tissue lining the sinuses. It can affect people of all ages, including children. Paranasal sinuses are hollow spaces in the…

Introduction Sciatica is nerve pain from an injury or irritation to your sciatica nerve. In addition to pain, it can involve tingling or numbness in your back or butt that may…

Introduction Rheumatoid arthritis (RA) is a chronic autoimmune disease that causes pain, swelling and stiffness in the lining of your joints (synovium). It most commonly affects the joints in your…

Introduction Kidney stones are solid masses or crystals that form from substances (like minerals, acids and salts) in your kidneys. They can be as small as a grain of sand…

Introduction Psoriasis is an autoimmune skin condition that causes a rash with itchy, scaly patches, most commonly on the knees, elbows, trunk and scalp. Psoriasis is a common, long-term (chronic)…

Introduction Osteoporosis is a disease that weakens your bones. It makes your bones thinner and less dense than they should be. People with osteoporosis are much more likely to experience…

Introduction Osteoarthritis is the most common type of arthritis (a condition that affects your joints). Healthcare providers sometimes refer to it as degenerative joint disease or OA. It happens when…

Introduction Obesity is a complex disease involving having too much body fat. Obesity isn't just a cosmetic concern. It's a medical problem that increases the risk of many other diseases…

Introduction The liver is an organ that sits just under the rib cage on the right side of the abdomen. It can weigh up to 4 pounds (1.8 kilograms). The…