Rheumatoid arthritis is a very demanding inflammatory disease that affects the joints in the patient's body. Swelling of the joints is a big problem for people who get this disease and disrupts their normal daily function. Muscles weaken, range of motion decreases and people feel tired. Morning stiffness is one of the first symptoms of rheumatoid Arthritis. It is more common in females and manifests in middle age. The disease is of a progressive type, but a phase of remission may occur gradually. It appears in parallel on both joints, which means that both hands will be affected. All joints in the body can be affected, but in the most common cases it occurs on the hands, feet and knees. The cause of this disease is still unknown, and it affects people all over the world. The onset of the disease is influenced by many factors, so it is very important to detect it in time for treatment and rehabilitation. The treatment includes various processes such as medical diagnostics to determine the existence of the disease, X-rays and many others. All health professionals who contribute to improvement are present in the treatment plan and program. Specialist rheumatologist, nurses, psychologist and physiotherapist take care of patients every day, guide them and advise the best. In most cases, treatment is conservative if there is no situation that surgery must be performed. After all the examinations, a physiotherapeutic process takes place, in which the patient's anamnesis is taken first, and the first examination and measurements are performed. All patient data are needed to develop the most effective treatment plan possible. Depending on the patient's condition and abilities, physical therapy is prescribed, the main goal of which is to restore the best possible range of motion, muscle strength and normal function. Along with the whole rehabilitation process, the diet of the patient is very important, which significantly affects the metabolism and immunity.