Raynaud's (pronounced 'ray-nose') is an extreme response to cold, usually affecting the hands and feet.
Reactive arthritis is an inflammatory condition that causes pain, stiffness, and sometimes swelling in the joints. It usually occurs as a reaction to an infection and normally goes away on its own within a few months without causing ongoing problems.
Rheumatic fever is a serious illness that affects the valves of the heart. It mainly affects children or teenagers, after a specific type of sore throat called Group A streptococcal (GAS) infection.
Rheumatoid arthritis occurs when your body’s defence system attacks your joints between your bones, causing symptoms such as swelling, pain and stiffness. Early treatment, which includes medicines and non-medication therapies, can help slow the progression of the disease and minimise joint damage.