why is my hair so dry

Hair becomes dry primarily because it does not receive or retain enough moisture. Common causes include environmental factors such as living in a dry or hot climate, exposure to sun and wind, and frequent swimming in chlorinated or salty water. Hair care habits like washing hair too often, using harsh shampoos and styling products, excessive heat from blow dryers or straighteners, and chemical treatments like dying or perming often strip hair of its natural oils and moisture. Additionally, hair may become dry due to certain health conditions such as hypothyroidism or malnutrition, and it is more common as people age because natural oil production decreases. Hair texture also plays a role; for example, curly hair may be more prone to dryness because natural oils have a harder time traveling down the hair shaft.