Gently tickle the inside of your nostril with a clean tissue or cotton swab
Look at a bright light if that reliably triggers sneezing for you
Sniff a small amount of black pepper from a safe distance
Smell a strong scent like mint or perfume if it triggers you
Take a deep breath of cool air
Rub the bridge of your nose
Try a saline nasal spray
Blow your nose gently
Use a clean feather or soft tissue to lightly stimulate the nose
Avoid inserting anything deep into your nose