Danazol and Dinofirst are both used to manage Endometriosis, but they work differently and have different side effect profiles. Endometriosis happens when tissue similar to the uterine lining grows outside the uterus and causes pelvic pain, painful periods, bloating, or fertility-related problems. Danazol works by suppressing hormones that stimulate endometriosis tissue growth, but it may cause side effects such as weight gain, acne, oily skin, hair growth, voice changes, or mood changes because it has androgen-like effects. Dinofirst contains dienogest, a progesterone-related medicine that helps reduce endometriosis activity and pain with a more targeted hormonal effect. It is often preferred now because it is generally better tolerated for long-term use in many women. Both medicines should be taken only under a gynaecologist's supervision because treatment choice depends on age, pain severity, fertility plans, bleeding pattern, and medical history. Regular follow-up is important to monitor symptom control and side effects.