The term “vacation” refers to menstruation. Menstruation that is always delayed may be normal, but it may also be an endocrine disorder. A woman’s normal menstrual cycle is 21-35 days, with an average of about 28 days, but the menstrual cycle is also affected by many factors, and may be advanced or delayed, and if it is advanced or delayed for a period of one week or less, it is considered a normal phenomenon. If menstruation is often delayed for more than a week and there is no regularity in the menstrual cycle, you need to consider whether you have endocrine disorders. 1. Polycystic Ovary Syndrome: Polycystic Ovary Syndrome is a relatively common endocrine disorder, androgen levels are relatively high, the patient may experience scanty menstruation or amenorrhea, infertility, obesity, hirsutism and other symptoms. 2. Hyperprolactinemia: If the level of prolactin in the body is too high, it may lead to breast lactation, scanty menstruation or amenorrhea, infertility and so on. If the high level of prolactin is caused by pituitary prolactinoma, the patient may also suffer from headache, blurred vision, visual impairment, and so on. 3. Hypothyroidism: If a woman has hypothyroidism, it may lead to scanty and sparse menstruation or even amenorrhea. It is recommended that patients whose menstruation is always delayed should consult a doctor in time to find out the cause, and actively treat the disease under the doctor’s guidance to avoid delaying the condition.