Mesotherapy is a technique involving injections of plant extracts, vitamins, and hormones to rejuvenate skin and remove excess fat by targeting adipose fat cells. It requires a series of 4-6 treatments for optimal results and can be combined with other cosmetic procedures while addressing various skin issues such as dehydration and inflammation. However, it has contraindications for certain medical conditions and pregnant individuals, and adequate care should be taken in selecting safe products.