Do timers create buyer's remorse?

I'm curious about the psychological impact of countdown timers on customer purchasing decisions. While these timers are designed to create urgency, I'm worried they might actually make customers feel manipulated or pressured, potentially leading to negative emotions after making a purchase. Are these timers truly effective, or do they risk creating buyer's remorse and damaging long-term customer trust? I want to understand the fine line between creating genuine urgency and making customers feel uncomfortable or coerced into buying something they might later regret.