Excessive use of hair styling equipment, products and chemicals can damage hair and lead to thinning. To prevent damage, use heat tools in moderation and avoid tight hairstyles that pull on hair follicles. Allowing hair to air dry when possible prevents moisture loss that weakens hair. Limit chemical treatments like dyeing, perming and straightening that damage hair fibers and cause breakage. Adopting safer hair care practices can help preserve hair thickness and prevent hair loss.