It is not normal to have a period in 22 days. Clinically, if the cycle is less than 25 days, it is considered frequent, and this condition is often caused by insufficient luteal function. It is recommended that progesterone supplementation during the second half of the menstrual period will improve the short menstrual cycle. It is also important to rule out that the shortened menstrual cycle is due to submucosal fibroids, and an ultrasound is recommended. If submucosal fibroids are found, surgery is recommended as soon as possible and the menstrual cycle will return to normal after treatment. In addition, if the shortened menstrual cycle is also directly related to thrombocytopenia and abnormal coagulation function, it is recommended to check the blood count and coagulation time.