Smelly green snot in one nostril?

Green snot from only one nostril can suggest a foreign object in the nostril, an infection such as sinusitis, or a structural issue within the nostril. If you have inserted any object into your nose or recently received a blow to the face, it's important to seek immediate medical attention. If the green snot persists beyond a few days, it is advisable to consult a medical professional for an appropriate diagnosis and treatment plan.