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10 Everyday Things That Can Affect Your Period

If your period changed, became heavier, lighter, longer, or less frequent, would you notice? Paying attention to changes in your cycle provides a clue into your overall health. While some issues, such as stress, may temporarily affect your period and resolve on their own, others can indicate a more serious health problem that needs to be addressed. “I always recommend patients download a period tracker app on their phone,” says Eduardo Lara-Torre, M.D., an ob-gyn at Carilion Clinic in Virginia. “It’s important to understand what’s normal for you so you can identify when something isn’t right.” Addressing any menstrual changes early on can prevent them from getting worse so you can sail smoothly through your monthly flow.

RELATED: Your Brain On: Your Menstrual Cycle

A Serious Stressor
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You’ve heard that stress can mess with your cycle. But although they’re not exactly good for you, daily hassles (you know: commuting, deadlines, presentations) are unlikely to impact your cycle. “It often takes a one-time extraordinarily stressful event to create an abnormal period,” Lara-Torre says. Think: Death of a family member, loss of your job, divorce, or illness. There may be an evolutionary explanation behind this phenomenon: When you’re focused on survival (whether the threat is a saber tooth tiger or paying your mortgage) your body and brain shut down the hormones needed to make your body ovulate in order to prevent reproduction in a threatening environment, Lara-Torre says. (Very cool.)

Excess Exercise
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Working out for hours a day may put your periods on hold. Your body perceives excess exercise as an extreme stressor and may put the kibosh on the monthly hormonal symphony it’s used to producing. “You need a certain amount of body fat to ovulate, so if your body fat dips too low you may stop ovulating,” says Mary Jane Minkin, M.D., professor of obstetrics and gynecology at Yale School of Medicine. You may notice you don’t get your period at all or you get it a few times per year on an unpredictable schedule.

RELATED: 9 Good Reasons to Skip Your Workout

Alcohol
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A few boozy nights out could leave you with more lasting effects than a string of killer hangovers. According to the National Institute on Alcohol Abuse and Alcoholism, drinking, even in amounts that won’t cause damage to your liver or other organs, can cause irregular menstrual cycles. Alcohol may temporarily increase levels of estrogen and testosterone, which may disrupt with the normal hormonal fluctuations necessary for ovulation. As a result, your periods may become irregular or even M.I.A. Researchers aren’t sure how much alcohol it takes to disrupt your cycle—the quantity likely varies from woman to woman, but sticking to the guideline of one drink or less per day is the best way to keep your pinot from interfering with your period.

Weight Gain
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Rapid weight gain, such as packing on 50 pounds over the course of a few months, can throw your hormones for a loop. “With weight gain, your ovaries start producing extra testosterone,” Minkin says. “This can prevent ovulation, so you may have very long cycles or skip your period altogether.”

Infections
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An infection won’t impact your cycle on a hormonal level, but it can cause bleeding and make you think you’re getting your period more frequently than normal. “Bacterial infections, pelvic inflammatory disease, and sexually transmitted infections can cause the inside of your uterus to become inflamed and bleed,” Lara-Torre says. “You’ll still get your regular period, but you may bleed in between because of the infection.” You may even experience cramping because the uterus perceives bleeding as an irritant. If the bleeding seems random and you experience any other signs of an infection such as painful urination, pain or tenderness in your abdomen, pain or itching in your vagina, unusual discharge, fever, or vomiting, pay a visit to your gyno.

RELATED: 7 Conversations You Must Have for a Healthy Sex Life

Anti-Depressants or Anti-Psychotics
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Antidepressants and anti-psychotic medications can disrupt your cycle and cause you to skip periods or get them more frequently. “Many of these medications elevate a pituitary hormone called prolactin, which can alter other hormones in your body that regulate your cycle,” Minkin says.

Shift Work
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In a study of 119,000 women, researchers found that those working evenings and nights had a 33 percent higher risk of menstrual problems such as irregular periods and fluctuations in how long they lasted. The more your work schedule fluctuates, the more likely you are to experience problematic periods. One study found that women who worked rotating shifts were 23 percent more likely to have very short cycles (less than 21 days) or very long ones (40 days or more) than those who followed a more set schedule (even if they worked nights), the journal Epidemiology reports. One explanation is that shift work disrupts your body’s circadian rhythm, which controls a variety of biological functions including your menstrual cycle.

Thyroid Disorder
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In a study of 119,000 women, researchers found that those working evenings and nights had a 33 percent higher risk of menstrual problems such as irregular periods and fluctuations in how long they lasted. The more your work schedule fluctuates, the more likely you are to experience problematic periods. One study found that women who worked rotating shifts were 23 percent more likely to have very short cycles (less than 21 days) or very long ones (40 days or more) than those who followed a more set schedule (even if they worked nights), the journal Epidemiology reports. One explanation is that shift work disrupts your body’s circadian rhythm, which controls a variety of biological functions including your menstrual cycle.

Smoking
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Women who smoke experience much worse PMS than women who don’t, according to researchers at the University of Massachusetts in Amherst. Your risk of developing PMS climbs the more you smoke and the younger you were when you first started puffing. According to researchers, smoking may alter levels of estrogen, progesterone, testosterone, and other hormones involved in the development of PMS. Women who smoke also have shorter and more irregular menstrual cycles than non-smokers.

The good news: You can actually use your menstrual cycle to help you quit. Researchers at the University of Pittsburgh School of Medicine found that women who quit smoking during days one and 14 of their menstrual cycle experienced less severe withdrawal symptoms than those who quit between day 14 and the start of their next period.

PCOS
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Do you have long, unpredictable, or M.I.A. periods? Polycystic ovary syndrome (PCOS) may be to blame. The condition affects as many as 10 percent of women of childbearing age. PCOS is a hormonal imbalance in which the ovaries produce too much testosterone, which blocks ovulation. “When you don’t ovulate, you don’t get the release of progesterone, which causes you to get your period,” Minkin says. PCOS is the most common cause of infertility in women. Here’s the thing: Even if you had regular periods before, for unknown reasons you may spontaneously develop PCOS. In addition to long and irregular periods, other signs of PCOS include acne, excessive hair growth, and weight gain. Discuss your symptoms with your doctor. While birth control pills can help regulate your cycle, PCOS is associated with other serious health conditions such as obesity, diabetes, high blood pressure, heart disease, and more.