What Are the Causes of Amenorrhea (Absence of Menstruation) for Six Months in a 22-Year-Old?
May 26, 2026
Source: Cainiu Health
Dr. Zhang Lu
Introduction
In general, amenorrhea (absence of menstruation) for six months in a 22-year-old woman may result from chronic irregular sleep patterns, excessive dieting for weight loss, polycystic ovary syndrome (PCOS), hypothyroidism, or intrauterine adhesions. If associated symptoms arise, prompt consultation and treatment at a reputable hospital are recommended. In daily life, maintaining regular sleep habits and a balanced diet is essential, and extreme weight-loss methods should be avoided.
Generally, amenorrhea (absence of menstruation) lasting six months in a 22-year-old woman may result from chronic circadian rhythm disruption, excessive dieting for weight loss, polycystic ovary syndrome (PCOS), hypothyroidism, or intrauterine adhesions. If associated symptoms arise, prompt evaluation and treatment at a reputable hospital are recommended. A detailed analysis follows:
1. Chronic Circadian Rhythm Disruption
Prolonged sleep deprivation or frequent reversal of day–night cycles disrupts the hypothalamic–pituitary–ovarian (HPO) axis, leading to endocrine fluctuations that inhibit normal endometrial proliferation and shedding—resulting in prolonged menstrual delay or amenorrhea. Daily routines should be stabilized, with adequate sleep ensured; regular moderate aerobic exercise is also advised to maintain endocrine balance.
2. Excessive Dieting for Weight Loss
Rapid weight loss or extreme caloric restriction within a short period depletes body fat stores, reducing availability of substrates required for estrogen synthesis—thereby compromising the maintenance of a normal menstrual cycle and triggering amenorrhea. A balanced diet should be resumed promptly, incorporating high-quality protein and essential micronutrients; extreme dietary restriction must cease, and weight should be gradually restored to a healthy range.
3. Polycystic Ovary Syndrome (PCOS)
Endocrine and metabolic dysregulation in PCOS elevates circulating androgen levels, impairing follicular development and ovulation—leading to oligomenorrhea or prolonged amenorrhea. Treatment may include oral contraceptives such as ethinylestradiol/cyproterone acetate tablets, dydrogesterone tablets, or metformin extended-release tablets, per physician guidance. Concurrently, weight management through lifestyle modification—including regular physical activity—is crucial for restoring endocrine homeostasis.
4. Hypothyroidism
Inadequate thyroid hormone secretion disrupts systemic metabolic regulation and interferes with ovarian hormone production, thereby impairing cyclical endometrial changes and causing prolonged amenorrhea. Management may involve levothyroxine sodium tablets or thyroid extract tablets, along with traditional Chinese medicine formulations such as *Bu Zhong Yi Qi Wan* (Tonify the Spleen and Augment the Qi Pill), under medical supervision, to restore metabolic and endocrine function.
5. Intrauterine Adhesions (Asherman’s Syndrome)
Endometrial injury—often following uterine instrumentation—may lead to intrauterine adhesions, preventing normal endometrial proliferation and shedding and thus obstructing menstruation. Hysteroscopic adhesiolysis is the standard surgical intervention. Postoperatively, meticulous genital hygiene is essential to prevent recurrent intrauterine trauma.
In daily life, maintaining regular sleep–wake patterns and a nutritionally balanced diet is vital; extreme weight-loss methods must be avoided. When prolonged menstrual delay occurs, timely assessment—including serum sex hormone profiling and evaluation of uterine cavity morphology—is critical to identify the underlying cause and initiate targeted, evidence-based management—thereby preventing long-term amenorrhea from adversely affecting ovarian and uterine health.
