Algotherapy is a method of natural therapy that involves the use of seaweed-based therapies to treat various skin and body conditions. There are several other terms and phrases that can be used as synonyms for algotherapy, such as thalassotherapy, seaweed therapy, marine therapy, and seaweed bath treatments. These alternative names all refer to similar techniques that use the healing properties of marine organisms and minerals present in seawater. Algotherapy and its synonyms can be used to offer relief and treatment for various skin and body conditions, including acne, eczema, psoriasis, and joint pain.