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What is the difference between primary and secondary dysmenorrhea?

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Diagram of the menstrual cycle showing hormone levels, follicle development, and endometrial changes across 28 days. It highlights menstruation, ovulation, and the follicular and luteal phases, with labeled curves for estrogen, progesterone, FSH, and LH. — menstruation Cyclical changes during a woman's normal ovulatory menstrual cycle.

Dysmenorrhea refers to painful cramps experienced before or during menstruation, and it is categorized into two types based on the underlying cause.12

Primary Dysmenorrhea

Primary dysmenorrhea is the most common form and is caused by imbalances within the endocrine system during the menstrual cycle. Specifically, it results from the release of excessive amounts of prostaglandins, which are hormone-like substances that stimulate the uterus to contract. Symptoms can range from minor cramps to severe distress and may include fatigue, nausea, and headache.1

Secondary Dysmenorrhea

Secondary dysmenorrhea is less common and is caused by distinct organic disorders or pelvic diseases. Potential causes include:12
* Endometriosis
* Genital obstructions
* Pelvic inflammation
* Tumours or polyps
* Chronic uterine infection

Unlike the primary form, the pain associated with secondary dysmenorrhea is often described as dull, aching, and persistent, and treatment is specifically directed toward the underlying condition.12