Low activated partial thromboplastin time is mainly related to coagulation problems, mostly related to endogenous coagulation, while the most common clinical causes are thrombotic diseases like cerebral thrombosis, coronary heart disease, lower limb vein thrombosis, etc. Also low activated partial thromboplastin time can occur in the state before the formation of thrombosis. This can also occur with anticoagulants used to prevent coronary artery disease such as aspirin and clopidogrel. If the activated partial thromboplastin time is occasionally low, it is advisable to review the test, which is generally not that accurate, especially if it is not too low and does not have much clinical significance. So if you want to be sure what the cause is, it is advisable to go to the hospital for a detailed examination in order to confirm the diagnosis.