Introduction Water is an essential component in the structure and vital functions of the skin, constituting a large percentage of cells and tissues. The Role of Water in the Skin Maintaining skin elasticity Supporting blood circulation Improving nutrient transport Reducing dryness The Relationship Between Internal and External Hydration Although drinking water is important, it is also true that: Topical moisturization is necessary The skin barrier plays a fundamental role Effects of Dehydration Loss of skin radiance Increased wrinkles Slower healing process Scientific Fact Drinking water is important, but it is not a direct cure for all skin problems; rather, it is a supportive factor. Conclusion Comprehensive hydration (internal + external) is essential for healthy skin. Prepared by: Dr. Haider Riyadh Abis AL_mustaqbal University is the first university in Iraq