You don’t need to say much. A brief, professional message that you’re unwell and won’t be in today is enough for a single sick day. You are not required to name anxiety specifically, explain your symptoms, or justify why you need the time. If that sounds too simple, it’s because most people overthink this, especially when the illness feels invisible. Here’s exactly what to say, how to say it, and what your employer can and can’t ask.
You Don’t Have to Say “Anxiety”
The most important thing to understand is that you control how much you disclose. In most situations, you can keep your specific condition completely private. The EEOC is clear on this: employers are only allowed to ask medical questions in a narrow set of circumstances, such as when you’re requesting a formal workplace accommodation or there’s objective evidence you can’t safely do your job. A routine sick day doesn’t trigger either of those.
For a day or two off, you won’t need to provide details or proof. A simple, honest statement that you’re not feeling well is professionally appropriate and legally sufficient. You can be as vague or as specific as you’re comfortable with.
Scripts You Can Use Today
Choose the level of detail that feels right for your situation and your relationship with your manager.
Minimal Detail
“Hi [name], I’m not feeling well today and need to take a sick day. I expect to be back tomorrow. I’ll make sure [urgent task] is covered. Thanks for understanding.”
This is the safest, most universal option. It’s honest (you genuinely aren’t well), it’s professional, and it doesn’t invite follow-up questions. Most managers hear this and move on.
Moderate Detail
“Hi [name], I’m dealing with a health issue today and won’t be able to perform at my best. I’m going to take the day to rest and recover, and I plan to be back tomorrow.”
This works well if you want to acknowledge that it’s more than a headache without naming the condition. The phrase “won’t be able to perform at my best” signals that you’re making a responsible decision, not just bailing.
Open About Mental Health
“Hi [name], my anxiety has been particularly high this week, and I know I won’t be performing at my best if I come in today. I’m going to take the day to focus on my health, and I should be back tomorrow feeling much better. Thank you for your understanding.”
This level of honesty works best in workplaces where mental health is openly discussed, or with a manager you trust. It’s direct without being oversharing. If you choose this route, know that your employer is legally required to keep your health information confidential, even from coworkers.
When and How to Send the Message
Notify your manager as early as possible. Waiting until five minutes before your shift creates stress for everyone, including you. If you wake up knowing you can’t go in, send the message right then, even if it’s before your boss is online. This gives your team time to redistribute anything urgent.
Use whatever method your workplace normally expects for reporting absences. That might be a phone call, a text, an email, or an absence-reporting system. If you’re not sure, a text or email is generally fine for a single day off because it’s less intrusive than a phone call and creates a written record. One practical benefit of texting or emailing: it’s much easier to keep the message short and composed when anxiety is the very reason you’re calling out.
Keep your message to three or four sentences. State that you’re unwell, give a return date if you can, mention any coverage for critical tasks, and thank them. That’s it.
Why Anxiety Is a Legitimate Reason to Call In
If you’re feeling guilty about this, consider what actually happens when you try to push through a high-anxiety day. Research published in Applied Health Economics and Health Policy found that anxiety disorders are associated with worse work performance than many chronic physical conditions. People with generalized anxiety had higher odds of decreased productivity and more frequent absences. Showing up while mentally impaired, sometimes called presenteeism, often costs more in errors and reduced output than taking the day off.
Anxiety isn’t just feeling worried. During a severe episode, your ability to concentrate, make decisions, and regulate emotions is measurably impaired. That’s a real physiological state, not a character flaw. Taking a sick day to recover from it is no different from staying home with a migraine or a stomach virus.
What Your Employer Can and Can’t Ask
For a standard sick day, your employer can ask when you expect to return. That’s about it. They cannot demand a specific diagnosis, ask about your mental health history, or require you to prove you were “sick enough” to justify the absence.
If you’re requesting a formal accommodation (like a modified schedule or extended leave), the rules shift slightly. Your employer may ask you to describe your condition in general terms and submit documentation from a healthcare provider. Even then, you don’t have to share your exact diagnosis. Documentation stating you have an “anxiety disorder” without further detail can be sufficient, according to EEOC guidance.
If your employer does learn about your condition, they are prohibited from discriminating against you because of it, and they must keep the information confidential.
If You Need More Than a Day or Two
A single mental health day usually doesn’t require any paperwork. But if your anxiety requires a longer absence, two legal protections may apply.
Under the Americans with Disabilities Act, your employer may be required to grant leave as a reasonable accommodation for a mental health condition, even if company policy wouldn’t normally allow it. This can include occasional unscheduled absences, adjusted hours, or part-time scheduling. The only exception is if your absence creates an undue hardship on the business.
Under the Family and Medical Leave Act, anxiety qualifies as a serious health condition if it involves continuing treatment by a healthcare provider. Specifically, that means either a chronic condition (like an anxiety disorder) that causes occasional periods of inability to work and requires treatment at least twice a year, or a condition that keeps you out for more than three consecutive days with ongoing medical care. Your employer can request a certification letter from your provider, but that letter does not need to include a diagnosis. It just needs to confirm that you have a condition requiring leave.
FMLA also covers intermittent leave, meaning you can take a few hours or a day at a time rather than one long block. This is especially useful for anxiety, which tends to flare unpredictably rather than follow a neat recovery timeline.
Tips for Making It Easier on Yourself
Draft your message the night before if you can see a bad day coming. Having the words already written removes the barrier of composing something while you’re in the middle of an anxiety spike. Save a template in your notes app so it’s always ready.
Avoid over-explaining. The urge to justify yourself is natural, especially when anxiety is driving it, but long messages with excessive detail can actually make things awkward. Your manager doesn’t need a paragraph about your symptoms. A few calm, professional sentences signal that you’re handling the situation responsibly.
If you’re taking mental health days regularly, that’s useful information. It may be a sign that a workplace accommodation, a therapy adjustment, or a conversation with your doctor could help address the underlying pattern rather than managing it one sick day at a time.