What are the serious consequences of dysmenorrhea?

Patient's question:

Patient Age: 20
Detailed Condition and Purpose of Consultation: To Understand the Situation
Current General Condition: My menstrual cycle is often delayed. During the university military training in August last year, it was delayed by two months, but later it returned to normal. Now it is usually delayed by 3 to 5 days, sometimes by 20 days. On the first day of my period, I experience lower abdominal pain, which disappears by the second day. Last winter, I had two instances of severe pain accompanied by vomiting and diarrhea.
History of Previous Diagnoses and Treatments and Their Effects: I have taken medications such as Gynecological Qianjin Pills, but they have not been effective.

Doctor's answer:

Menstruation generally has a relatively stable cycle for each individual. Some people may experience a delay of a few days each time. If it's consistently delayed by a few days every month, it is actually considered normal and there is no need to worry.
During your military training, the delay of two months was likely due to your body suddenly being subjected to intense physical activity, which could cause menstruation to temporarily stop. This is similar to someone experiencing two periods in a month after moving to a different country—when the body is exposed to sudden significant external changes, menstruation may be delayed or occur more frequently. This is also a normal response.
Occasional severe pain may be related to your mood or feeling cold. If it's not frequent, there is no need to worry.
Pain on the first day is common and can be considered a form of "dysmenorrhea."