My 2 year old has been sneezing with a runny nose what can i do to prevent it from getting worse?

Runny nose: if your 2 year old can blow their nose, that is a great way to help. If they can't blow their nose, you can help by using a product called the nose frida. Also, it is important to have excellent hand hygiene (hand-washing), proper diet, and lots of liquids. See doc if gets worse or if you get concerned.

Nothing much: If your son has only runny nose with sneezing , has no fever & he is eating fairly well , he most likely has either allergy or a viral illness & it will take its own course . He needs rest & plenty of fluids with medication to help his symptoms .