Discs are cartilage plates consisting of an outer fibrous ring and an inner gelatinous substance, which begin to wear out with age, lose water and become less flexible, thus making the spine more vulnerable to external influences. In the case of a herniated disc, the outer fibrous ring breaks and the inner gel material protrudes, compressing the exiting spinal nerve root or the spinal cord itself. If the fibrous ring does not tear, but the inner stock protrudes, then we speak of disc protrusion. Its root causes include monotonous training without a professional warm-up, sudden strain, posture problems caused by a sedentary lifestyle. Its symptoms can be diverse, from dull pain to sharp, numbing, radiating pain, which can also occur with other musculoskeletal problems. If muscle weakness, urinary and stool retention problems (neurological symptoms) occur, consult a neurologist as soon as possible. Disc herniation is primarily treated with McKenzie therapy.