It is usually due to boils on the mucous membrane of the nasal cavity or the skin of the tip or wings of the nose, which is also known as acute folliculitis. Some are prone to pus formation if they are single and multiple. There may also be acute nasal vestibulitis or perichondritis of the nose, which are caused by repeated nose picking, digging, or plucking of nasal hairs that damage the mucosa and secondary follicular infections. In the facial triangle of danger, serious intracranial complications can arise because the veins can flow back into the skull and the anatomy of the veins themselves do not have venous valves. One of the most serious conditions, for example, is acute cavernous sinus thrombophlebitis. If you find redness or boils in the nasal triangle, be sure not to blindly squeeze the irritation to avoid spreading the inflammation, and use broad-spectrum, sensitive antibiotics to control the infection first.