Hydration plays a central role in maintaining epidermal barrier integrity and dermal elasticity. During fasting hours, the absence of fluid intake may lead to varying degrees of transient dehydration, particularly in hot climates or in individuals with inadequate fluid replacement during non-fasting hours. Dehydration affects the skin in several ways: • Increased transepidermal water loss (TEWL) • Reduced skin turgor and elasticity • Temporary exaggeration of fine lines • Impaired barrier recovery • Increased susceptibility to irritation Although healthy individuals often compensate through nighttime rehydration, insufficient fluid intake between Iftar and Suhoor may compromise skin hydration status. This is particularly relevant in patients undergoing fractional laser resurfacing, chemical peels, or microneedling, where epidermal barrier disruption requires optimal hydration for recovery. From a clinical standpoint, practitioners should advise patients to maintain adequate hydration during non-fasting hours and avoid procedures in individuals demonstrating signs of significant dehydration. AL_mustaqbal University is the first university in Iraq