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What is menstruation? — Menstruation is the medical term for having your period. Doctors also use the terms "menstrual cycle" or "menses." During your period, you bleed from your vagina.
People with a uterus start getting their period when they go through puberty. They continue getting periods until they reach "menopause." This is when periods naturally stop.
Why does menstruation happen? — Menstruation happens because of hormone changes that affect the uterus. Certain hormones start changing when a person's body reaches "reproductive age." This means the age when it is physically possible to get pregnant.
Different hormone levels rise and fall at different times during the menstrual cycle. This causes changes in the body. During each cycle:
●The lining of the uterus starts to thicken (figure 1).
●One of the ovaries releases an egg. This is called "ovulation."
●If the egg is "fertilized" by sperm, the person becomes pregnant. The thickened lining of the uterus is ready to hold the pregnancy.
●If the person does not get pregnant, the body "sheds" the uterus lining. It comes out of the vagina in the form of blood and small bits of tissue. This is the menstrual period.
●This cycle repeats about once a month.
How often should I get a period? — When a person first starts getting their period, they might not get one every month. Early on, it is normal for a period to skip a month, or come more frequently.
Over time, periods should become more regular:
●Most people get a period about once a month. But a normal cycle can range from 24 days to 38 days. Cycle length is counted from the first day of your last period to the first day of your next period.
●Each period, meaning the time you are bleeding, lasts from a few days to about a week.
It's a good idea to keep track of how often you get your period and how long it lasts. This way, you will know if something changes.
Does menstruation cause other symptoms? — It can. Along with bleeding, some people have other symptoms. These symptoms are related to hormone changes and can happen even before your period starts. They can include:
●Acne
●Bloating (a feeling of fullness in the belly)
●Breast soreness or swelling
●Cramps
●Diarrhea
●Eating more than usual, or craving certain foods
●Feeling very tired
●Headache
●Mood changes, like feeling angry, worried, or sad
●Nausea
●Sleeping too much, or having trouble sleeping
●Trouble concentrating
Some people get something called "premenstrual syndrome" ("PMS"). This is when these symptoms happen often and have a negative effect on your life. When these symptoms are severe, doctors call it "premenstrual dysphoric disorder" ("PMDD"). This usually needs treatment with prescription medicines.
What things can affect my period? — It's normal for your cycle to sometimes be a few days shorter or longer than usual.
Many different things can make your period come less often or not at all. They include:
●Pregnancy
●Breastfeeding
●Heavy exercise, feeling very stressed, or big changes in weight
●Certain health problems, for example, a condition called "polycystic ovary syndrome"
●Certain medicines, including some types of birth control
●Menopause
If your periods stop completely for no obvious reason, or seem very irregular, tell your doctor or nurse. They might want to do tests to try to figure out the cause.
What are the different types of menstrual products? — There are many different products you can use during your period. They include:
●Pads – These stick to your underwear to absorb blood. They come in different sizes and thicknesses. Most pads are disposable, meaning you throw them away after you use them. Some you can wash and reuse.
●Tampons – These are made of cotton or another absorbent material. Tampons are compressed so that they are easy to insert into the vagina. Once inside the body, the tampon expands as it absorbs moisture and blood.
Tampons are available in different sizes depending on how heavy your period is. For example, many come in light, regular, and super absorbency. Some come with disposable plastic or cardboard "applicators" to make them easier to put in. Tampons have a string that hangs outside of the body to help you remove the tampon.
Tampons should be changed at least every 4 to 8 hours. Leaving a tampon in for too long increases the risk of a serious problem called "toxic shock syndrome."
●Menstrual cups and discs – These are small, flexible cups or discs made of rubber or a similar material. They go inside the vagina to catch blood before it leaves the body. Cups and discs come in different brands and sizes. They can be worn for up to 12 hours, then washed and reused.
●Period underwear and swimwear – There are special underwear and swimwear that absorb blood. These can be washed and reused.
You might need to try different products to find what works for you. Some people change which product they use depending on how heavy their period is at a given time. This also depends on your preferences and lifestyle. For example, some athletes (including swimmers) might prefer tampons or a menstrual cup instead of pads.
You might also want to consider cost. Some people prefer reusable products instead of those that are thrown away.
How can I take care of myself during my period? — You can do all of your normal activities while you have your period.
If you have symptoms related to your period, it can help to:
●Avoid salty foods and eating large meals – This might help if you have bloating.
●Take an "NSAID" medicine for pain or headaches – NSAIDs are a group of medicines that includes ibuprofen (sample brand names: Advil, Motrin) and naproxen (sample brand name: Aleve).
●Put a heating pad or hot water bottle on your lower belly – This can help relieve cramps. Make sure to not burn your skin.
You might also find that it helps to get regular physical activity and find ways to lower stress. These things can improve your overall health and mood.
When should I call the doctor? — Call your doctor or nurse for advice if:
●You are older than 15 and still have not had your period.
●You used to get periods, but you have not had one for more than 3 months.
●Your periods used to be regular, but have started coming more or less often.
●You are soaking through a pad or tampon every 1 or 2 hours.
●You are passing large lumps or "clots" of blood.
●You have symptoms that bother you.
●You think that you might be pregnant.
Patient education: Absent or irregular periods (The Basics)
Patient education: Heavy periods (The Basics)
Patient education: Painful periods (The Basics)
Patient education: Premenstrual syndrome (PMS) and premenstrual dysphoric disorder (PMDD) (The Basics)
Patient education: Normal puberty (The Basics)
Patient education: Absent or irregular periods (Beyond the Basics)
Patient education: Heavy periods (Beyond the Basics)
Patient education: Painful menstrual periods (dysmenorrhea) (Beyond the Basics)
Patient education: Premenstrual syndrome (PMS) and premenstrual dysphoric disorder (PMDD) (Beyond the Basics)
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