This depends largely on the severity of your injury as well as individual characteristics. Some grade 1 and 2 cases can expect to experience significant relief within a year of the injury, but other research shows that up to 50% of whiplash patients develop chronic problems. It’s been proven that patients who suffer from PTSD increased the likelihood of whiplash patients experiencing chronic symptoms. Unfortunately, chronic symptoms from whiplash can last up to 10 years after an injury. It’s important to see a professional and assess the best form of treatment to decrease the likelihood of chronic symptoms.