Chronic illnesses such as arthritis, Crohn’s disease, or fibromyalgia can lead to flare-ups that make it impossible to work. If you experience a flare-up, calling in sick to rest and manage your symptoms is a valid choice. Many employers are understanding when it comes to chronic health conditions, but it’s helpful to maintain open communication with your supervisor and HR about your health needs. If flare-ups are frequent, you may need to explore long-term accommodations such as flexible hours, remote work, or reduced workload under the Americans with Disabilities Act (ADA). It's important to take care of your health first, and most employers recognize that addressing chronic illness effectively allows you to be more productive in the long run. Being proactive about discussing your needs with your employer ensures that both your health and work responsibilities are managed properly.