Understanding the causes, triggers and how to prevent them
When summer arrives, many people notice an increase in intimate discomfort that seems to “appear out of nowhere”: itching, burning, irritation and unusual discharge. In many cases, the diagnosis ends up being the same: a yeast infection.
But why does this happen precisely during the hottest time of the year? The answer has a lot to do with the environment that summer creates in the body — especially in the intimate area — and with some habits that are common during this season.
Below, you will understand in detail what a yeast infection is, why it tends to appear more often in summer, which factors increase the risk and what you can do to reduce the chances of recurrent episodes.
What is a yeast infection?
A yeast infection is caused by fungi of the genus Candida, most commonly Candida albicans. This fungus can naturally be present in different parts of the body, such as the skin, mouth, intestines and genital region, without causing any problems.
The issue arises when an imbalance occurs: Candida shifts from being a “normal resident” to becoming excessive, multiplying more than expected and causing inflammation and symptoms.
In vulvovaginal candidiasis (the most common form), the inflammation affects the vulva and/or the vagina. In men, Candida can cause balanitis, leading to irritation of the glans and foreskin, especially in situations involving moisture and friction.
Why does summer favor yeast infections?
Summer brings together three conditions that strongly favor fungal growth: heat, moisture and limited ventilation. For Candida, this is practically the “perfect scenario”.
Below are the main reasons, explained one by one.
1) Heat and sweat: the ideal environment for fungi
In higher temperatures, the body sweats more. The intimate area, because it remains covered most of the time, tends to accumulate heat and moisture.
Fungi, in general, proliferate better in environments that are:
• warm
• moist
• poorly ventilated
In other words, the more sweat and trapped heat there is, the greater the chance that Candida will multiply quickly.
In addition, the combination of sweat and friction can irritate the skin and mucosa of the intimate region. When this protective barrier becomes sensitive, the risk of infection increases because the body loses part of its natural local protection.
2) Wet swimsuits and bikinis for hours: a classic summer trigger
One of the most common triggers for yeast infections in summer is staying in wet swimwear for long periods.
Even if the water itself is clean, wet fabric:
• keeps the area moist for a long time
• reduces ventilation
• increases friction with the skin and mucosa
This prolongs the ideal conditions for Candida to multiply. Many people will have no issues at all, but those who are already prone to yeast infections or who are more sensitive may develop symptoms after this habit.
3) Tight clothing and synthetic fabrics: less “breathing”, more risk
During summer, clothing such as very tight shorts, fitted pants, leggings and synthetic underwear is common — and it can worsen the situation.
The issue is not “the clothing itself”, but the combined effect of:
tightness + heat + sweat + limited ventilation.
Synthetic fabrics tend to retain more moisture and heat than natural fibers, increasing the time the intimate area remains humid.
4) Changes in vaginal pH and microbiota: when natural defenses weaken
The vagina has its own balance, supported by a healthy microbiota (mainly lactobacilli) and by an appropriate pH level. This system acts as a defense, making it harder for opportunistic microorganisms like Candida to multiply excessively.
In summer, some habits can disrupt this balance.
Excessive use of soaps and scented products
With higher temperatures, many people increase their hygiene routine. However, “more cleaning” does not always mean “more health”.
Inappropriate products (very harsh soaps, intimate deodorants, perfumes and fragranced wipes) can:
• irritate the mucosa
• alter the pH
• reduce protective lactobacilli
Vaginal douching
Internal douching can remove the natural protection and facilitate imbalances. It is often considered a risk factor for recurrent irritation and infections.
In short: when the protective microbiota decreases, Candida finds more room to grow.
5) Summer routine changes: sleep, diet, alcohol and immunity
Summer often comes with routine changes: travel, parties, irregular schedules, less sleep and more indulgences. This matters because the immune system plays an important role in keeping Candida under control.
Some common examples include:
• sleeping less or sleeping poorly
• increased sugar consumption (ice cream, sodas, sweets and cocktails)
• drinking more alcohol
• travel stress, work demands or frequent movement
None of these automatically causes a yeast infection, but they may contribute to weakening the body’s resistance and facilitating imbalances.
6) Friction and irritation: when the skin becomes vulnerable
During summer, it is common to experience more:
• long walks and outdoor activities
• constant sweating
• tight clothing against the body
• more frequent sexual activity (for example during vacations)
Constant friction can cause small irritations. When the mucosa becomes sensitive, it is more susceptible to inflammation — and this can be the final push for a yeast infection to appear, especially if the environment is already warm and humid.
Typical symptoms: how does a yeast infection usually appear?
The most common signs include:
• intense itching in the vulva and/or vagina
• burning sensation, especially during urination or intercourse
• redness and swelling in the area
• irritation and a feeling of “damaged skin”
• discharge that is usually white and thicker (often described as “cottage cheese–like”), typically without a strong odor
Attention: not every discharge indicates a yeast infection. Discharge with a strong odor (such as a fishy smell), grayish color, yellow or green tones, pelvic pain, fever or abnormal bleeding may indicate other conditions and should be evaluated.
Yeast infections in summer: why do some people get them and others do not?
This varies because each body has a different level of tolerance and different predisposing factors.
Some factors that increase the likelihood of yeast infections in any season include:
• history of recurrent yeast infections
• diabetes (especially if poorly controlled)
• recent antibiotic use
• use of corticosteroids or immunosuppressive drugs
• pregnancy (due to hormonal changes)
• hormonal changes or contraceptive use in some cases
• weakened immunity caused by stress or sleep deprivation
In summer, these factors may combine with seasonal triggers, increasing the frequency of episodes.
How to prevent yeast infections in summer: practical and realistic measures
Without miracle promises, some simple habits can significantly reduce the risk.
Change wet clothing as soon as possible
After swimming in the pool or sea, dry yourself well and, whenever possible, change your bikini or swimsuit for dry clothing.
Prefer more breathable clothing
Whenever possible, choose looser garments and fabrics that allow the skin to breathe, especially on very hot days.
Be careful with excessive hygiene
• Avoid vaginal douching.
• Avoid scented products in the intimate area.
• If using soap, choose a gentle product and apply it only to the external area.
Dry the intimate area thoroughly
After showering, dry the area carefully. Residual moisture combined with heat is a combination that favors fungal growth.
Pay attention to daily panty liners
For some people, panty liners trap moisture and increase heat, especially in warm weather. If you notice a connection, reducing or avoiding them may help.
Look at your routine as a whole
Sleep, stress and diet influence the immune system. During summer, try to maintain:
• proper hydration
• reasonably regular sleep
• moderate consumption of sugar and alcohol
When should you seek medical advice?
Seek professional guidance if:
• it is your first time experiencing symptoms
• the symptoms are severe or persistent
• infections recur several times during the year
• you are pregnant
• you have diabetes or a compromised immune system
• there is pelvic pain, fever, unusual bleeding or discharge with strong odor
Self-medication can mask the problem or treat the wrong condition. Different infections may present similar symptoms, and the correct treatment depends on proper diagnosis.
Summer does not “create” Candida — it creates the perfect conditions for imbalance
Candida is usually already present in the body. What changes in summer is the environment: more heat, more sweat, more moisture, more wet clothing, more friction and often a routine that disrupts sleep and immunity.
By understanding these triggers, it becomes much easier to prevent problems — and if symptoms appear, to seek the right care without prolonged discomfort.
