Best to check with docs at such a young age, I know some products are suitable from birth but at that age you're better off getting anything checked before using. I swear by nasal spray but I didn't start using that until about 1,5-2 years of age and I've heard that it can irritate the nostrils in really young babies, maybe drops are more suitable but I'm not sure if the same applies because it's basically salty water. I did use the sucker thing from about 3-4 months of age when we had our first cold but as they're much more vulnerable in the first two months I'd deffo check with a doc, health visitor, midwife or pharmacist. As I can imagine you might want to refrain from going into docs office too often too.