Patients that are 60 years of age or older. Patients that are obese. Patients that are on birth control. Patients that smoke. Patients that are sedentary. Patients that have inherited conditions that make them more likely to develop clot are at the highest risk. If you have one of these risk factors, it’s really important to pay attention to signs or symptoms of developing a DVT, but also to discuss further with your doctor, otherwise you might be able to protect yourself against DVT long term.