After sexual intercourse, some people may feel hot and thirsty, and then rush to drink cold water or iced drinks for a moment of "relief."
For couples, sexual intercourse is a strenuous activity for the mind, psychology, and body. If one drinks cold water immediately after, they only get temporary physical comfort, but this is not conducive to mental recovery and can have many adverse effects on the body.
Although the many harms of drinking cold water after intercourse have not yet been fully proven, its effects on the gastrointestinal tract and blood pressure are becoming increasingly apparent. During the act, blood circulation throughout the body accelerates, the vagus nerve becomes excited, and blood vessels dilate. This can manifest as elevated blood pressure, a faster heartbeat, increased gastrointestinal motility, flushed skin, and open sweat glands with excessive perspiration.
If one rushes to drink cold water after intercourse, it causes blood vessels throughout the body to constrict. For example, if the gastrointestinal blood vessels, which are still in a state of congestion, suddenly constrict upon encountering cold, it can cause gastrointestinal discomfort or cramps, and even stomach spasms. Cold water can also stimulate the already dilated cardiovascular system, leading to changes in blood pressure, which can easily trigger cardiovascular and cerebrovascular diseases in people who have such conditions. Drinking cold water when the sexual organs are congested may also cause some sensitive individuals to experience discomfort such as a feeling of heaviness in the lower abdomen.
If you feel thirsty, it's better to drink a small amount of warm water first. You could also have a glass of milk, which can aid sleep because the body and mind feel significantly fatigued after intercourse, making it easy to fall asleep. Therefore, when both partners enter the resolution phase, they should try to fall asleep as soon as possible. Women can also drink some fruit juice and dairy products containing lactic acid bacteria. Studies have shown that these can help prevent and reduce the recurrence of urinary tract infections in women.