Proper etiquette when dealing with sneezing and runny noses involves more than just saying 'bless you.' Experts suggest using a tissue carefully by folding and dabbing, rather than wiping aggressively. If more attention is needed, stepping outside is recommended to avoid disturbing others. Additionally, carrying a small plastic bag for used tissues is advised to maintain hygiene, especially in shared spaces like offices and restaurants. This practice helps prevent unsightly piles of tissues and promotes a cleaner environment.