My 9day old baby keeps sneezing?

Normal, most likely: Newborns famously sneeze as a mild reaction to stress or transition (eg waking up, getting changed, walking into a loud room). It is more hilarious than problematic. If your child was --more seriously--having trouble feeding, being fussy, having fever, or appearing ill, then you need contact your child's health care provider.

Nose breathers: Babies breath through their nose and consequently produce a lot of mucus sneezing is one of the ways they get rid of it.

Normal: All babys hiccup, sneeze and become cross-eyed. Sneezing is the only way that babys can clear out their airways (since they breathe almost exclusively through their noses) , and it quite common for them to sneeze multiple times in a row.

Air pollution: A newborn will react with cough and sneezing when any irritant triggers the response. This is commonly things as simple as a woman's perfume,fragrances from a plug in or freshly laundered linen, smoke, dust, etc.If you can smell it it can make baby sneeze.Regular rinsing of the nose with saline will help.Avoiding all the air pollutants can help a lot.