I would leave it. If it gets worse and more symptoms appear than ok.Not sure if should contact care agency and tell them mum was bit snuffly at weekend. She had bit of cough n bit sniffy on saturday but by mid afternoon was ok for rest of day. Yesterday she said was a bit stuffed up so took paracetomols was ok most of day till evening wen had bit snuffly head but hasn't mentioned it and sounds fine today. I think it was probably just a snuffly cold or maybe a bit of hayfever as my sister sent flowers and they have been irritating me a bit too.