Acne generally refers to the mild manifestation of acne. Acne in the nose can be properly sterilized with iodine vapour and then apply medications such as metronidazole gel or erythromycin ointment. Acne is a chronic inflammatory skin disease, can occur in many parts of the body, sebaceous glands distribution of the location of the more prone to hair, generally to the face mostly. If you have acne in the nasal cavity, apply metronidazole gel or erythromycin ointment after local disinfection with iodophor. Generally 4~7 days acne can subside by itself. If the pain is severe, you should seek medical attention. In addition, acne is mainly related to excessive sebum secretion that causes blockage of hair follicles, so you should avoid squeezing with your hands or other hard objects to avoid more serious infections. There will be no significant adverse reactions when applying the two medications, with occasional dryness, burning sensation, and irritation of the skin. It can be eliminated after stopping the medication. If serious adverse reactions occur, immediate medical attention is required. In addition, it is prohibited for people who are allergic to both drugs, as well as when the properties of the drugs have changed. Metronidazole gel is contraindicated in pregnant women and nursing mothers. In all cases, it is necessary to follow medical advice before use. It is recommended that acne should be treated promptly and in accordance with medical recommendations.