Reasons your period may feel heavier and more painful during summer, according to a gynaecologist

Many people notice subtle, and sometimes not-so-subtle, changes in their menstrual cycle as the seasons shift. While winter may bring irregular or delayed periods for some, summer is often associated with heavier bleeding, increased cramps, or more intense mood swings. But is the heat really to blame? (Source: Freepik)

From rising temperatures and dehydration to potential hormonal fluctuations, several theories exist around why your period might feel worse during the warmer months. To understand this, we asked a medical expert to weigh in. (Source: Freepik)

Can increased heat and dehydration during summer actually affect the volume or intensity of menstrual bleeding?

Dr Shaily Sharma, consultant gynaecologist at Cloudnine hospital, Faridabad, tells indianexpress.com, “High temperatures and dehydration can indirectly influence your period. In hot weather, the body loses more fluids through sweating, and if you're not staying well-hydrated, it can lead to physical stress.” (Source: Freepik)

Physical stress can disrupt your hormonal balance and affect blood circulation, she adds, which in some individuals might lead to a heavier flow or intensified menstrual cramps. Dehydration may also thicken the blood slightly, making periods feel more clotted or heavier. (Source: Freepik)

Role of the body’s hormonal response to seasonal changes in how periods behave in summer

According to Dr Sharma, hormonal levels in the body “are influenced by environmental changes, including sunlight exposure and temperature.” Increased daylight exposure during summer boosts melatonin and serotonin regulation, which in turn affects the hypothalamus and the pituitary gland both of which are involved in menstrual hormone regulation. (Source: Freepik)

For some women, this shift in hormonal patterns can lead to a shorter cycle or a heavier flow, although the changes are usually subtle. If someone is already prone to hormonal fluctuations, summer may amplify those effects. (Source: Freepik)

Could summer-related lifestyle factors contribute to heavier or more uncomfortable periods?

Summer often brings changes in routine, more physical activity, travel stress, disrupted sleep, and altered diet, all of which can affect hormonal balance. “Increased physical exertion or lack of rest can put the body under stress, which might trigger irregular or heavier periods. Also, if someone’s iron levels are already borderline low, increased blood loss can lead to more fatigue and discomfort during menstruation,” notes Dr Sharma. (Source: Freepik)