Studies show that only three sunbed sessions a year can increase a woman’s risk of endometriosis.

Not only are women at increased risk of developing endometriosis, but only three sessions a year in the sunbed Skin cancer, Scientists revealed.

Exposure to sunbeds and UVA UV light may not only increase the likelihood of developing malignant melanoma, the most dangerous form of skin cancer, but also increase the risk of developing endometriosis, according to a new study. There is also sex.

The study found that the more young women who use sunbeds, tans, and sunscreens in their teens and younger adults, the greater their risk of endometriosis.

But conversely, researchers also found that women living in areas with high levels of natural UVB UV light throughout the year were less likely to be diagnosed with endometriosis.

The long-term condition is often painful, and tissue that resembles the lining of the uterus begins to grow elsewhere, such as in the ovaries and fallopian tubes.

Symptoms include lower abdominal, back or pelvic pain, severe menstrual cramps, and pain during or after sexual intercourse.

Women at birth, 15 and 30 years old, who lived in the most sunny areas, were at greater risk of endometriosis than women who lived in areas of the United States with the least annual sunshine. It decreased by 19%, 21% and 10%.

This means that 4 out of 100 women can develop endometriosis if they are 15 years old and live in some of the countries with the highest UV levels. In contrast, if you live in the area with the lowest UV levels, it’s close to 6 out of 100.

But importantly, natural light is primarily UVB light, which boosts vitamin D, boosts immunity, and suppresses inflammation.

Tanning salons are primarily UVA rays that are known to damage cells and adversely affect immunity.

After adjusting the analysis to take into account factors that may affect results, researchers found that six times a year in teens and young adults compared to women who had never used a tanning bed. It was found that 19% of women used the above increased risk of endometriosis.

The risk increased by 24% when used more than 6 times a year between the ages of 25 and 35, and 30 years when using a tanning bed more than 3 times a year throughout life. The risk of endometriosis has increased by a percentage.

This means that if you are a teenager, a young adult, or have never used a tanning bed between the ages of 25 and 35, about 5 in 100 women will be in utero over an average follow-up period of about 14 years per person. It means that you can develop endometriosis, but according to nearly seven female researchers, one in 100 will develop it if they use a tanning bed more than three times a year. ..

Professor Leslie Farland, an assistant professor at the University of Arizona School of Public Health (USA), who led the study, said: “Previous studies on the long-term health effects of endometriosis suggest that women with endometriosis are at greater risk. Melanoma.

“The exact mechanism underlying the association between endometriosis and melanoma is unknown, but some studies have shown that it is sun-sensitive, hard to sunburn, redheads, bright eyes, freckles, or high in the womb of women. It is known that there is a high risk of endometriosis. The number of freckles.

“These associations may reflect the general genetic background between endometriosis and melanoma, or the underlying association between sun exposure and the risk of endometriosis. there is.”

Professor Farland of Michigan State University, College of Human Medicine, Harvard University of Public Health and Paris Saclay University, French National Institute of Health Sciences (INSERM) and his colleagues studied 116,429 white women who joined the US nurse. ‘The 1989 Health Study II, when they were between the ages of 25 and 42.

Participants will be asked every two years until June 2015 about their history of chronic diseases and their exposure to risk factors, including sunburn trends, number of moles on their feet, and number of severe sunburns. I answered. Between the ages of 15 and 20.

In 1993 they provided up-to-date information on sunscreen use, and in 2005 reported on the use of sunscreens from teens to early adulthood and between the ages of 25 and 35.

Since 1993, participants have also been asked if they have endometriosis and have been diagnosed by laparoscopy. This is the gold standard for a correct diagnosis of the condition.

Their home address was updated every two years and linked to the area’s annual ambient UV A and UV B data.

Of the 95,080 women included in the analysis, there were 4,791 cases of endometriosis diagnosed with laparoscopy during the follow-up period.

Professor Stacy Mismer, a professor at Michigan State University’s College of Human Medicine, a professor at Harvard University’s School of Public Health, and co-author of the study, said: “Little is known about how to modify behavior to reduce risk. The onset of endometriosis.

“There is much we do not yet understand the relationship between recreational and residential sun exposure and the risk of endometriosis.

“But our findings suggest that avoiding excessive recreational sun exposure and tanning beds may reduce the risk of endometriosis.”

Studies have found that a history of five or more sunburns between the ages of 15 and 20 is associated with a 12% increased risk of endometriosis compared to women who have never had a sunburn. It was.

People who constantly use sunscreen have a 10% increased risk of endometriosis compared to those who have never used sunscreen, which researchers used as an indicator of how long they have been sunbathing or participating in other outdoor activities. Did.

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The absolute risk of developing endometriosis in women who tan more than five times a year between the ages of 15 and 20 was too small to show the difference between the two groups.

Professor Farland said: “In the last three decades, more people have been diagnosed with skin cancer than all other cancers combined.

“From a public health perspective, we already know that women should avoid tanning beds to reduce the risk of melanoma.

“This study strengthens advice on avoiding the use of tanning beds and suggests that there may be additional benefits of reducing the risk of endometriosis.

“Women should follow health advice to avoid sunburn by avoiding sunburn, preventing sunburn, obscuring, looking for shade, and using wide spectrum UVA / UVB sunscreens.”

The study was published today (Wednesday) in Human Reproduction, one of the world’s leading reproductive medicine journals.