The painful purple toes are commonly caused by the following reasons: 1, venous thrombosis, when the foot blood vessels embolism, can appear purple and pain, need to go to the hospital in time to check the lower extremity of the venous ultrasound and toe ultrasound to clarify, if the disease, need to actively carry out thrombolysis, dispel aggregation, blood and other treatment. 2, arterial thrombosis, when the toe arterial embolism, will also cause the symptoms, which need to go to the hospital in time to improve the relevant examination and give treatment. 3, caused by trauma, when the foot is smashed or squeezed by violence, there can be soft tissue bleeding, and may appear necrosis, there will be purple and painful symptoms, need to go to the hospital in time to take X-ray, and tissue ultrasound to clarify. There are other causes, such as coagulation disorders or vasospasm. In any case, if there is a significant abnormality in the toe, it is necessary to go to the hospital promptly to clarify the cause.