Hi When we sneeze, the secretions of our nasal mucosa are expelled out. So this smell comes from her nasal mucosal secretions How our secretion smells largely depends upon two factors: -Our diet -Any underlying medical condition we are affected with You need to be investigated. Are you taking any thing sweet, smelly in diet on a regular basis? May be a certain wine etc. Just as an example, people who smoke expel a smoky smell when they sneeze Typically, diabetics have an ammonia like smell in their breath or sneeze. Patients with liver disorders or kidney problems may also smell similar Sinus problem/ENT exam is suggested. This is so because, sinus problem is the most common cause of smelly sneezes Do meditation and regular exercise which will help in increasing the immunity and limit allergic episods Wish You Good Health Regards Dr Sridhar K