Infiltrations with cortisone or hyaluronic acid are particularly indicated in the treatment of certain joint diseases, such as arthrosis. In the case of hyaluronic acid, which is mainly used in cases of gonalgia of traumatic origin or gonarthrosis, the therapy aims to act at the source of knee pain not only by reducing its intensity through instant lubrication of the joint pad, but also by preventing the contamination of inflammatory cells in healthy tissue. Other applications of infiltration therapy are cases of cervico-brachialgia and cervicalgia, in which case the infiltration is done in the perineural area, i.e. near the nerve structure. The same technique is used in cases of sciatica, lumbosciatica or lumbago that may arise due to inflammation of the sciatic nerve from a herniated disc, which is more common in cases of patients under 50 years of age. Another common origin of sciatica is arthrosis of the hip, which predominantly affects the elderly population.