Redness and swelling of the nose may be caused mainly by nasal skin infections, and possibly by nasal acne or rosacea. The thick skin of the tip of the nose and the nose below the external nose is rich in sweat and sebaceous glands and is a good site for nasal boils, acne and rosacea. When the skin of the external nose is infected by bacteria, it can cause nasal boils to occur. Young patients may be prone to acne and possible secondary bacterial skin infections due to endocrine disorders, and rosacea may also occur due to irritation from various factors. Since the nose is located in the dangerous triangle of the head and face, the veins in this area can be directly connected to the cranial cavernous sinuses through the non-valved facial veins, and there is a risk of intracranial infection if the nasal boils are not properly squeezed. For details, a visit to the otorhinolaryngology department is required for a definite diagnosis.