Your vagina is home to beneficial bacteria that help maintain a slightly acidic environment and protect against infections. It also contains opportunistic microbes that are usually harmless. However, when the vaginal environment changes—due to excess moisture, heat, or a disrupted pH balance—these microbes can multiply and cause infections.
Maintaining a healthy vaginal microbiome is key to preventing discomfort and reducing the risk of common vaginal infections.
Expert insight provided by OB-GYN Prof. Kristina Jarienė, MD, PhD.
Heat and Moisture Create the Perfect Environment for Infections
Excessive sweating, wet swimsuits, and tight synthetic clothing create a warm, damp environment that can disrupt the vaginal microbiome.
These conditions may encourage the growth of opportunistic microorganisms such as Candida yeast or bacteria associated with bacterial vaginosis.
Hot Weather and Tampon Use
During the summer, leaving a tampon in for too long may disturb the vaginal pH and bacterial balance, potentially increasing the risk of infections such as bacterial vaginosis or, in rare cases, toxic shock syndrome.
Changing tampons regularly and maintaining good menstrual hygiene are especially important during hot weather.
Can Chlorine Affect Vaginal Health?
Swimming pool water treated with chlorine may reduce the number of beneficial bacteria in the vagina. If the vaginal microbiome is already imbalanced, this may increase susceptibility to infections.
Why Breathable Underwear Matters
Synthetic fabrics tend to trap heat and moisture, reducing airflow around the intimate area. This creates conditions that may encourage the growth of opportunistic microbes and disrupt the natural vaginal microbiome.
Tips for Maintaining Vaginal Health During Summer
- Change out of a wet swimsuit as soon as possible.
- Choose breathable underwear made from cotton or TENCEL™ fibers.
- If you wear period panties, select breathable products made without PFAS, such as GENIAL Period Panties.
- Change tampons approximately every three hours and always after swimming, or consider using a menstrual cup.
- A GENIAL TPE Menstrual Cup is a reusable, eco-friendly alternative that may reduce irritation associated with prolonged tampon use.
- Avoid synthetic panty liners and choose breathable alternatives whenever possible.
- GENIAL DAY Liners are designed to allow airflow while helping maintain freshness throughout the day.
- Use highly absorbent, breathable menstrual pads during your period.
- GENIAL DAY Pads provide breathable protection and long-lasting comfort.
- Wash the intimate area with a gentle, fragrance-free intimate cleanser.
The Bottom Line
Summer heat, humidity, swimming, and prolonged moisture can all influence the vaginal microbiome. While these factors don't necessarily cause infections on their own, they may increase the risk when combined with poor airflow or prolonged exposure to moisture.
Simple habits—such as changing out of wet clothing promptly, choosing breathable menstrual products and underwear, practicing good menstrual hygiene, and using gentle skincare products—can help support intimate health throughout the warmer months.
Take care of your intimate health this summer by making small daily choices that help keep your vaginal microbiome balanced.
