Hair Longer, Fuller, Or Thicker On One Side-Individual hairs on your head and body grow independently of one another. Each hair follicle produces hair based on its specific genetic instruction, handed down from birth. Hair follicles will sometimes produce hair of a different texture and colors than the other hair follicles. External influences may play a major role. You may experience some pulling of the hair due to friction being caused by rubbing against cotton or cotton blended pillows .