"Do you notice an unpleasant smell from your scalp by the evening?"
"In summer, does your hair feel greasy at the roots and never quite feel fresh?"
Have you ever experienced this?
Summer is a season of high temperatures and humidity, making us more likely to sweat.
The scalp contains many sebaceous and sweat glands, so increased sweat and sebum can make greasiness and unpleasant odors more noticeable.
However, scalp odor is not simply caused by "sweating." Sebum and sweat left on the scalp can change over time, and factors such as breakdown by naturally occurring bacteria and oxidation are also involved.
In this article, we will clearly explain the causes of scalp odor and greasiness in summer, along with the right daily scalp care routine.
CONTENTS
Summer Scalp Odor Self-Check
First, let's check the current condition of your scalp.
- You notice an unpleasant smell from your scalp or hair roots by the evening
- Your scalp becomes noticeably greasier in summer
- Your hair roots feel heavy the day after shampooing
- Your scalp feels hot and stuffy after sweating
- You often wear a hat for long periods
- You sometimes let your hair air-dry after washing it
The more items that apply to you, the more worthwhile it may be to take another look at your everyday scalp care routine.
Why Your Scalp Is More Likely to Smell in Summer

When you notice an unpleasant scalp odor, it is easy to assume that it is simply "because you have been sweating" or "because of your age."
However, several factors may actually be involved.
Sweat and Sebum Remaining on the Scalp
The scalp contains many sebaceous and sweat glands, and we tend to sweat more frequently during summer.
Sweat and sebum do not necessarily have a strong odor on their own. Over time, naturally occurring bacteria on the scalp can break them down, while sebum can also oxidize, resulting in substances that contribute to unpleasant odors.
For this reason, avoiding leaving sweat and sebum on the scalp for long periods is one of the basic steps for preventing scalp odor in summer.
Your Shampooing Technique May Not Be Right for Your Scalp
Even if you are concerned about scalp odor, using a strongly cleansing shampoo and scrubbing your scalp vigorously is not necessarily the best approach.
The key is to focus on washing your scalp rather than your hair. Gently massage the entire scalp using the pads of your fingers, and rinse thoroughly to make sure no shampoo remains.
Inadequate Rinsing or Residue
Even if you work your shampoo into a rich lather, insufficient rinsing may leave shampoo residue or impurities on the scalp.
The areas behind the ears, around the nape of the neck, and at the back of the head are particularly prone to being insufficiently rinsed. Think of rinsing as an essential part of shampooing, not just an afterthought.
Going to Bed with Wet Hair
It may be tempting to think, "It's hot, so air-drying is fine," but it is best to avoid leaving your hair wet for long periods.
After washing your hair, gently remove excess moisture with a towel, then use a hair dryer starting from the scalp.
Rather than focusing only on the hair itself, make sure to dry the roots and scalp thoroughly as well.
5 Essential Steps for Preventing Scalp Odor

✔ Rinse Thoroughly Before Shampooing
Instead of applying shampoo right away, first wet your scalp and hair thoroughly with lukewarm water.
Pre-rinsing helps remove sweat, dust, and other impurities more easily. Apply an appropriate amount of shampoo after lightly lathering it in your palms, then gently wash your scalp using the pads of your fingers.
✔ Focus on Washing Gently, Not Washing Hard
When you are concerned about scalp odor, it can be tempting to scrub harder. However, there is no need to use your fingernails or scrub your scalp vigorously.
Use the pads of your fingers and gently massage your scalp as if moving the scalp itself. After shampooing, rinse thoroughly to ensure that no residue remains.
✔ Start Drying from the Scalp
After towel-drying, use a hair dryer to dry your scalp and hair roots first.
Rather than directing hot air at the same spot continuously, move the hair dryer as you dry. Make sure to dry not only the surface of your hair but also your scalp thoroughly.
✔ Don't Leave Sweat on Your Scalp for Long Periods
On days when you sweat heavily, it is also important to avoid leaving sweat and sebum on your scalp for long periods whenever possible.
If you wear a hat for long periods, remember to take it off occasionally to prevent excessive heat and humidity from building up and give your scalp a chance to breathe.
✔ Review Your Lifestyle Habits
The condition of your scalp is also connected to your everyday lifestyle habits. Be mindful of your overall health, including sleep, diet, and exercise.
Recommended Inner Care
When you are concerned about scalp odor, basic external care such as proper shampooing and washing techniques should come first.
Along with reviewing your daily diet and healthy habits, you may also consider incorporating inner care into your routine as needed.
One product we recommend is "ProButy3600," which contains lactic acid bacteria.
These lactic acid bacteria tablets contain a fermented yeast-produced substance derived from a complex group of lactic acid bacteria (BB3600 live bacteria powder), along with butyric acid bacteria ABP powder and water-soluble dietary fiber (inulin).
They are recommended for those who want to incorporate inner care into their daily health routine.
View Product DetailsIf you are concerned about scalp odor, it is important to first review the basics of scalp care, including shampooing, rinsing, and drying.
Healthy Habits from Within

To keep your scalp healthy, it is important to focus not only on external care but also on your everyday lifestyle habits.
🌟 Aim for a Well-Balanced Diet
Try to include a combination of staple foods, protein-rich main dishes, and side dishes, while making sure to consume a variety of nutrients.
🌟 Don't Forget to Stay Hydrated
Rather than drinking a large amount all at once after you become thirsty, it is recommended to drink small amounts regularly throughout the day.
🌟 Get Enough Sleep
In summer, heat and air conditioning can make it easier for sleep quality to decline. Create a comfortable sleeping environment and try to maintain a regular sleep schedule as much as possible.
🌟 Think of Supplements as Something That Complements Your Diet
Supplements are not a substitute for food. First, focus on maintaining basic healthy habits such as eating a well-balanced diet and getting enough sleep. If you are concerned about nutritional deficiencies, consider incorporating supplements into your routine as needed.
Frequently Asked Questions
Summary

Summer scalp odor and greasiness are influenced not only by sweat and sebum, but also by changes that occur over time, as well as how you wash, rinse, and dry your hair.
First, review the basics: wash your scalp gently, rinse thoroughly, and dry your hair properly after washing.
In addition, maintaining healthy daily habits such as eating a well-balanced diet, getting enough sleep, and staying hydrated is also important.
By combining external scalp care with healthy daily habits, you can work toward a fresh and healthy-feeling scalp even during the hot and sweaty summer months.