Heliotherapy is a treatment that uses sunlight or artificial light to improve health. It is often used to help with conditions like psoriasis, eczema, and certain types of depression. The exposure to ultraviolet (UV) light can promote healing and boost mood by increasing the production of vitamin D in the body. This therapy can be administered in various ways, including sunbathing or using special lamps that emit UV light. While heliotherapy can be beneficial, it is important to use it safely to avoid skin damage or increased risk of skin cancer. Always consult a healthcare professional before starting any new treatment.