This is a difficult challenge for nurses who know things and also have a compelling need to serve others. It's easy and ego-boosting to become the resident 'expert', but that can backfire. There is a reason why when people call the ER for advice, the standard answer is to present for an evaluation and advice isn't given over the phone. We live in a litigious society, and you worked hard for your license. Protect it just as hard. What may seem to be benign advice to your neighbor may result in catastrophic consequences. Also, it is best to give advice that points people in the direction of great care, such as writing down all symptoms.