3. It can take years for PTSD symptoms to begin.
You must have PTSD symptoms for at least one month for your doctor to make a diagnosis. However, it can take several months, even years before the symptoms become obvious enough to interfere with your life. People can experience PTSD-like symptoms right after a trauma, but this may be another condition called acute stress disorder. The symptoms, such as anxiety, depression and insomnia, are similar to PTSD. If you have acute stress disorder, you won’t necessarily go on to develop PTSD, particularly if you seek treatment as soon as possible.