Senna belongs to a stimulating laxative, with laxative effect, but it is not recommended that patients take large doses for a long time. The correct way to take senna is as follows: 1, bubble with boiling water: usually take the right amount of senna in boiling water, bubble time should not be too long, and so the water temperature is not too high to drink; 2, boil in a pot: you can take the right amount of senna into the pot to boil, it is generally recommended to cook slowly with low heat, after the water boils Sheng out, dry until warm and cool to take. Regular use of senna can produce dependence, once dependent, as soon as the patient stops the drug will be constipated. For patients with less serious constipation, it is not recommended to take senna, but to drink more yogurt and eat more high-fiber foods to regulate. For patients with frequent or severe constipation, small doses can be administered.