Swelling in the nostril may be seen in conditions like nasal polyposis (hypertrophy of nasal mucosa seen commonly in chronic nasal allergies), furuncles (frequently seen in children with a habit of nose picking), sebaceous cyst, acne, moles, skin warts, etc. None of these conditions are serious and can be easily managed. You should visit an ENT specialist in your area for further evaluation and advice.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.