Under some circumstances, the connection between your job and your injury will be obvious. For example, if you fall from a scaffold while installing a window on a building. Under such circumstances, you must simply notify your supervisor.
However, the connection is not always so obvious. For example, you may notice a tingling in your fingers and only later realize that the tingling is worse every time you type on your keyboard at work; or you may have a cough that leads to a diagnosis of tuberculosis and which your treating doctor associates with your work exposure.
If you suspect that your injury or disease was caused by your job, make an appointment with a doctor and discuss it with him. If the doctor believes that the condition is work-related , inform your employer as soon as possible.