Stretch marks can be prevented by maintaining a healthy weight, staying hydrated, consuming a balanced diet rich in vitamins and minerals, and using moisturizers to keep your skin hydrated and supple. To treat existing stretch marks, options include topical creams containing ingredients like hyaluronic acid, retinol, or vitamin C, laser therapy, microdermabrasion, and chemical peels. Consult with a dermatologist to determine the best treatment plan for your specific situation.