These 4 parts of a man's body are the dirtiest

Studies have found that there are about 1 million microorganisms per square centimeter of the scalp, the most numerous of which are hair follicle sebaceous mites. They like to make their homes in the epidermis of the scalp, gathering together in groups of three or five to form a "big family" that works together to survive by sucking the lipids secreted by the sebaceous glands, ultimately resulting in hair loss.

Countermeasures: To fight against them, in addition to washing your hair frequently, it is best to comb your hair with a comb every morning and evening. This can stimulate the scalp and allow it to ventilate.

2. Oral cavity

The mouth is a necessary place for food to pass through, but did you know that there are more than 100 million microorganisms per square centimeter in our mouth, including good bacteria and a considerable number of bad microorganisms, which are the culprits of bad breath. They parasitize between teeth and on the tongue, and produce unpleasant sulfur compounds while decomposing food residues and saliva.

Countermeasures: Keep your oral cavity clean and hygienic, brush your teeth carefully in the morning and evening, remember to use dental floss to clean the gaps between teeth before brushing, and clean your tongue after brushing your teeth. The bacteria remaining on the tongue will also damage your breath.

3. Axillary pits

In a crowded bus or subway, you may have experienced that unbearable smell more than once! It emanates from the armpits and recklessly pollutes the surrounding air. The number of microorganisms hiding in the armpits is as high as 1 billion to 10 billion per square centimeter. Sweat itself does not have a peculiar smell, but it is the "regular visitor" of the armpits. The rod-shaped bacteria are nourished by the fatty acids secreted by the skin, which multiply and breed a large number of bacteria, thus producing an unpleasant smell.

Countermeasures: Armpit sweating is not a disease. It can be eliminated by taking frequent baths and changing clothes. It is best to choose cotton underwear.

4. Intestine

There are more than 400 species of bacteria living in the intestines. Escherichia coli in the intestines are good tenants in the human inn, helping us digest and being part of our defense system. But Escherichia coli outside the intestines can cause disease, and if it "slips into" food, it can cause nausea, vomiting and diarrhea.

Countermeasures: To protect the intestines, it is recommended to drink 1-2 bottles of yogurt every day. The probiotics in it can inhibit the dominance of bad bacteria in the intestines and help good bacteria gain control over the intestines. In addition, insisting on moderate exercise, doing push-ups and abdominal massages regularly can prevent intestinal aging.