Dry and brittle hair occurs when hair strands lack moisture and natural oils, making them weak and prone to breakage. Common causes include excessive heat styling, chemical treatments, sun exposure, frequent washing, and poor nutrition. Environmental factors such as dry weather and pollution can also damage hair. This condition often leads to dullness, split ends, and rough texture. Proper care includes using moisturizing shampoos, deep conditioning treatments, and natural oils like coconut or argan oil. Reducing heat styling, protecting hair from sun damage, and maintaining a balanced diet rich in vitamins help restore strength and shine. With consistent care, dry and brittle hair can become softer, healthier, and more manageable.