Keeping your IBS a secret may end up being so stressful that it actually makes your symptoms worse. The key to telling others about your IBS is to choose the person you confide in wisely. If your company offers confidential counseling through an employee assistance program (EAP) or human resources department, make an appointment to find out what work modifications may be available to you.
Depending on their trustworthiness, consider telling your immediate supervisor about your IBS. This may help your boss to be more understanding of your need to take sick time or your reluctance to take on stressful responsibilities, such as those that involve travel or public speaking. Similarly, make a careful choice and confide in trustworthy co-workers. If they know what you are dealing with, they may be willing to cover your responsibilities should you need to take a break or use the restroom for an extended period of time.
With the wonders of modern technology, perhaps the company would be willing to let you work from home on the days that your IBS flare-up is more severe. Another option is to ask for a later shift, as IBS symptoms are often worse in the morning.
You do have rights (under the Americans with Disabilities Act) to ask for accommodations that will help you manage your symptoms and your job. A more extreme option is to look for a different job—one that offers more flexibility or is better suited for your body. Consider going freelance, allowing you to work from home, if possible in your field.
If constipation is your predominant symptom, allow time every morning for a relaxed trip to the bathroom, even if this means you have to get up a little earlier. If diarrhea is your predominant symptom, you will be glad for that extra time!
Deadlines can be very stressful. Make sure to utilize good time management skills and map out a plan to get your work done in a timely, relaxed manner. This way you are not stressing out your system any more than it already is.
If you have access to a human resources department, make an appointment. They are generally well-trained in helping people understand their options and navigate their way through the process.