A bad cold can make it difficult to concentrate and perform well at work, and coming into the office while sick could spread the virus to your coworkers. Calling in sick for a severe cold is a responsible choice, both for your health and the well-being of your team. If your symptoms are mild, some employers may offer the option of working from home, which allows you to rest while staying productive. Otherwise, taking a sick day to rest, hydrate, and recover is the best approach. Most companies have sick leave policies that cover short-term illnesses like colds, so it’s important to familiarize yourself with your company’s procedures for notifying your supervisor and taking time off.