You can buy a variety of laxative tea, weight loss tea, detoxification health products on the market, many with laxative effect, some patients will buy their own to take. In fact, some of these products contain “anthraquinone-type laxatives”, and long-term use of such products may lead to colonic melanosis, causing more stubborn constipation. So some patients with perennial constipation will find that the original effective laxative tea is useless, and the constipation becomes more stubborn. Therefore, I recommend that constipated patients take laxatives under the guidance of a specialist to avoid these conditions. Wang Xiaofeng, Department of Anorectal Medicine, Guang’anmen Hospital, Chinese Academy of Traditional Chinese Medicine