What is a common effect of overly aggressive brushing?

Overly aggressive brushing can lead to breakage of the hair strands. This occurs because excessive force causes tension on the hair, which can weaken the hair structure and result in split ends or even complete hair breakage. Healthy hair should be brushed gently to avoid damage, and the use of the right tools—like a wide-tooth comb or a brush designed for detangling—can help minimize stress on the hair. The other stated effects, such as enhancing shine, encouraging hair growth, or improving circulation, do not directly stem from aggressive brushing, and in fact, may be counterproductive, as healthy hair care practices are essential for maintaining shine and promoting growth.