The “psammatotherapy” or sand bath is the oldest treatment of Grado's Institute of Thalassotherapy . The thalassotherapy procedure is used for osteoarthritis prevention, post-traumatic treatments (car accidents, sports traumas), youth articulation rheumatisms, some rheumatoid arthritis phases and extra articulation rheumatisms, etc. As this treatment utilizes heat from the sun, it can only be performed during the summer, usually mid-June to end of August.