The question of whether it is possible to enter the ocean during menstruation is common, arising from a mix of social taboos and practical concerns. Swimming while menstruating is safe and a normal activity enjoyed globally. The physiological process of menstruation does not prevent participation in water activities, including ocean swimming, provided proper protection is utilized. Physical activity, such as swimming, can even offer benefits by helping to alleviate some discomfort associated with the menstrual cycle.
Separating Fact from Fiction About Ocean Swimming
One persistent concern about swimming in the ocean while menstruating involves attracting sharks. This fear is a long-standing myth, and scientific consensus indicates the amount of blood involved poses no increased danger. Sharks possess an extremely powerful sense of smell, capable of detecting minute quantities of substances in the water. However, menstrual flow is not pure blood; it is a mixture of blood, uterine lining tissue, and vaginal secretions.
The total volume of menstrual fluid released during an entire cycle is typically small, averaging only about three to four tablespoons. Any fluid that might escape while swimming would be quickly and heavily diluted in the vast volume of ocean water. There is no scientific evidence or data suggesting that menstruating individuals are disproportionately targeted by sharks. The majority of shark bites occur on men, largely reflecting historical rates of male participation in high-risk aquatic activities like surfing and diving.
Concerns about hygiene and infection while swimming in saltwater are common. While the ocean contains bacteria, the risk of developing a vaginal infection from swimming is low. The vagina naturally maintains a slightly acidic pH balance, which offers protection against external pathogens. To minimize risk, avoid remaining in a wet swimsuit for extended periods after leaving the water.
Practical Guide to Menstrual Protection in Water
When planning to swim, internal menstrual products offer the most reliable protection. Tampons are a widely used option, absorbing the flow before it can exit the body. It is best practice to insert a fresh, appropriately sized tampon immediately before entering the water. After swimming, the tampon should be changed promptly to prevent saturation with water. The tampon string should be tucked securely into the swimsuit to remain discreet.
Menstrual cups are often a preferred choice for water activities because they collect fluid rather than absorbing it. Since the cup is made of medical-grade silicone and creates a seal against the vaginal walls, it does not absorb the surrounding water. This makes them highly effective for extended time in the water, offering protection without the risk of saturation. Depending on the flow, a cup can be worn for up to 12 hours, though it should be emptied before a long swim.
Specialized period swimwear is another option, particularly useful for lighter flow days or as a backup layer. These garments feature a hidden, absorbent, and moisture-wicking layer in the gusset designed to catch small leaks. However, they are not intended to manage a heavy flow while submerged in water. Pads and panty liners are not suitable for swimming because their absorbent material will quickly soak up the water, rendering them ineffective for menstrual flow control.
The Effect of Water Pressure on Flow
Many individuals notice that their menstrual flow seems to stop entirely once they are immersed in water. This phenomenon is a result of physics, specifically the external water pressure acting on the body. When submerged, the surrounding water exerts a pressure greater than the internal force pushing the menstrual fluid out. This counteracting pressure is strong enough to temporarily prevent the flow from escaping the body.
The menstrual cycle itself does not stop; the uterus continues to shed its lining. The flow is merely blocked by the external force. Once you exit the ocean and the water pressure is removed, the flow will naturally resume its normal pattern. This temporary pause in visible flow does not negate the need to use a reliable internal menstrual product while swimming.