If someone asks a question out of the blue, many people’s first reaction is the hands, anus, feet, etc., each with their own life feelings and understanding, and perhaps other different answers, after all, in our common sense of physiology, the dirtiest parts of the human body is not only a physiological problem, perhaps also involved in ethics, lifestyle and other complex areas. A scientific study in the United States found that there are four dirtiest parts of the human body, in order, the intestines, armpits, mouth, scalp. This conclusion is not a small gap with our survey, for example, the most people think that the hands are the dirtiest, the nostrils are the dirtiest followed by the mouth in third place, the intestines ranked fourth …… the Third Affiliated Hospital of Southern Medical University, Department of Dermatology, Zhou Xian Coix U.S. “Prevention” magazine recently published an article pointed out that there are four places in the human body is the dirtiest, in order, the intestines, armpits The most dirty places are the intestines, armpits, mouth, and scalp. The basis for this is that these four places are full of microorganisms or bacteria, and once the flora is out of balance, people are prone to disease. If you do not look at the data, a little thought can be understood, such as the reason why the scalp is more dirty than the hands, because our head has thick hair, as if the original forest, to provide a good living environment for microorganisms, and we wash our hands more diligently; as for the oral cavity, where there are folds and wet environment, residual food residues will breed bacteria; and the intestinal tract is easier to understand. 1, armpit: armpit hair clumps are easy to breed bacteria, do not stay. In a crowded crowd, you can easily smell some unbearable odor on others, and it emanates from the armpits. Prevention magazine article said that the armpit microorganisms per square centimeter up to 1 billion – 10 billion, sweat itself does not have an odor, are rod-shaped flora in the armpit by the skin fatty acid nourishment, thus multiplying breeding a large number of bacteria, resulting in an unpleasant smell. Expert comment: The director of the Department of Dermatology and Venereology at the Third Affiliated Hospital of Southern Medical University, Zhou Xianxi, said that the skin under the armpit is soft, with more folds and relatively dense hair, which easily breeds bacteria. [Frequently Asked Questions] At present, common diseases of the armpit include fox odor, tinea cruris and ringworm, all of which are relatively easy to cure, except for fox odor, which needs to be treated by surgery and other techniques, the latter two can be easily cured by applying creams. [The armpits are very easy to clean, use soap to rub the armpits when bathing, or even just rinse with water to achieve the purpose of cleaning. Especially after exercise must be timely cleaning, do not cover sweat, that will make the armpit hair easier to breed bacteria. Armpit hair, has always been one of the most concerned about the beauty of the girl, especially as summer approaches, more and more girls and “hair removal war”, but afraid to remove the armpit hair affect sweat glands, that armpit hair in the end can not be removed? The first thing you need to do is to take off your armpit hair, which is small and easy to breed bacteria, and the impact of hair removal on excretion is small. [Reminder] As the plucking method to remove armpit hair, easy to make the pores expand, triggering infection, and the way to remove the armpit hair will make it harder and harder to grow faster and faster, director Zhou suggested that women who want to remove hair choose laser hair removal, a one-time solution to the worries. 2, scalp: wash your hair every day is not scientific two or three times a week is sufficient. Prevention magazine pointed out that the study found that there are about 1 million microorganisms per square centimeter of the scalp, the most of which are follicular lipid mites, they are in groups of three or five within the epidermis of the scalp, working together to suck the lipids secreted by the sebaceous glands, if not pay attention to the result is hair loss. With hair covering the scalp, it is indeed easy to hide dirt and grime because it cannot be washed as often as hand washing, and it is easy to nourish microorganisms, which can easily lead to scalp problems. [FAQ] 1. Seborrheic dermatitis: a chronic inflammatory skin disease that occurs on the scalp, eyebrows, eyelids, nose and other parts of the body where sebaceous glands are richly distributed. Typical symptoms are yellow-red spots, patches or macules, greasy scales, oozing in severe cases; or dry erythema with gray-white furfuraceous scales, self-conscious symptoms of varying degrees of pruritus. A kind of hair loss that occurs on the basis of excessive seborrhea, namely seborrheic alopecia, the symptoms of which are excessive seborrhea of the patient’s scalp, often accompanied by increased dandruff, greasy scalp and pronounced itching. 2, folliculitis: Staphylococcus aureus and other causes of papules, acute, subacute or chronic purulent or non-purulent inflammation of the hair follicles, preferably in the hair and vulnerable to friction parts, especially the scalp, the back of the neck and back. The clinical manifestations are initially small papules consistent with hair follicles, surrounded by a distinct red halo, with hair running through its center, rapidly forming corn-sized papules and small pustules, broken by a small amount of purulent secretions, and pruritic. 3, ringworm: ringworm infection of the scalp and hair caused by the ringworm bacteria, most often in children, more contagious, sharing hairdressing tools with others or contact with pets can be infected, divided into ringworm white, ringworm black spot, ringworm pus and yellow ringworm. 4. Dandruff: It is also considered a disease. Dandruff is the excessive proliferation and excessive shedding of the keratin layer on the scalp, which generally occurs mostly in patients with oily skin with more oil on the scalp, and the most serious ones become asbestos-like chaffing. [Daily care] or diligent shampooing, diligent shampooing is not the same as washing hair every day, using shampoo every day to make the scalp stimulated, the micro-ecological balance is affected, but is not conducive to scalp health. More importantly, the more oily hair people are too diligent in washing their hair the more they stimulate oily secretion. For this reason weekly shampoo 2-3 times is better, of course, some heavy pollution industry or the image of the higher requirements of the position, you can properly increase the number of times to wash your hair, wash every other day. Shampoo selection has been careful. Generally to use weak acidic shampoo products, the scalp has a good protective effect. Other qualities of the scalp, it is necessary to use targeted shampoo, such as anti-dandruff shampoo. Zhou Xian Coix stressed that shampoo contains chemical system, usually perm, hair dyeing process of chemical agents on the scalp more damage, try to reduce. Many women will use some small recipes, such as the use of rice water, beer, vinegar, etc. to clean hair. These things contain natural substances that balance the scalp micro-ecology without chemical agents and do not irritate the scalp and can take care of the scalp, which is why minority women have very long hair and good hair quality. [Reminder] People with scalp problems, such as patients with seborrheic dermatitis, should eat less sugary and greasy foods to reduce the oil secretion of the skin. Patients with folliculitis should try to keep their hair short, take a shower immediately after sweating from exercise to keep their scalp fresh, and do not squeeze pustules on the scalp at will. Patients with dermatophytosis should not share haircutting supplies with others and try to avoid close contact with pets.