Boils, which almost everyone has grown, are caused by inflammation and pus in the hair follicles on the skin due to bacterial infection. A boil is called a nasal boil if it grows on the tip or back of the nose at the front of the nasal cavity (medically known as the nasal vestibule). Nasal boils mostly occur in people with high sebum secretion, and they also easily occur in people who have bad habits such as digging their nostrils and plucking nose hairs. When the hair follicle is infected by bacteria such as Staphylococcus aureus and Streptococcus, it becomes inflamed. At the beginning, the inflamed follicle starts with a small red bag, which is painful and hard to touch. 3 to 5 days after the inflammation is limited, a small pus head grows on the surface. The pus head is broken and the pus flows out. 2 to 3 days for the inflammation to subside. However, some people often squeeze the pus head with their hands when they see it coming out, not knowing that such treatment can lead to serious consequences, even life-threatening. Why can’t I squeeze a boil? As you may have heard, there is a dangerous triangle on the human face, which is the area formed by the line from the root of the nose to the top of the corners of the mouth on both sides. The structure of the veins in this area is different from other parts of the body, as other parts of the body have valves to control the blood flowing back to the heart, while the veins in the triangle do not have valves, and blood can flow freely from the bottom up in the blood vessels. As a result, venous blood can enter the cavernous sinuses and the brain directly when it is under certain pressure. It is within this dangerous triangle that nasal boils are located. When the tip of the nose, the anterior nasal aperture and the upper lip become infected, if squeezed, it can cause the inflammation to spread and bacteria to invade directly into the cavernous sinuses and the brain, causing a serious life-threatening illness. What should I do if I have a boil inside the danger triangle? When a boil first starts, apply a hot towel to the area and apply 3% iodine or gentamycin ointment to encourage the boil to absorb. When the boil is almost ripe (that is, the boil is not so hard to the touch), you can apply ichthyolite ointment, which will cause the boil to ulcerate as soon as possible. If the boil has matured and small yellowish-white pus spots appear on the surface, you can use a sterilized surgical sharp knife or a syringe needle to gently pick at the pus spots to drain the pus. Sometimes the pus is very sticky and even forms a purulent plug, the pus plug should be removed to facilitate the flow of pus, and then anti-inflammatory ointment, such as gentamycin ointment or erythromycin ointment, should be applied. It can also be cleaned locally with 75% alcohol twice a day. At the same time, oral antibiotics of penicillin or cephalosporins, such as Pioneer 4 and Pioneer 6, can be administered as appropriate. Special attention should be paid to avoid bleeding incision and squeezing to drain the pus in the early stage of the boil. Because in the early stage of boils, the inflammation is not confined and abscesses are not formed, a lot of blood after incision will more easily lead to the spread of inflammation. How to prevent nasal boils? Those adolescents who have strong sebaceous glands and an oily face should wash their faces often and thoroughly to keep them clean and minimize the chances of bacterial infection. Those who have bad habits of plucking nose hairs and picking nostrils should change their bad habits. Those who often have boils on their face can take some herbal remedies to clear internal heat and dampness regularly, do not eat spicy foods, and keep their bowels open.