What are the similarities between cvi and dvt?

Similar: Both can cause leg swelling. Symptoms with DVT tend to be more abrupt in onset, but not always. The only effective way to differentiate the two are to have a venous duplex ultrasound evaluation. Many times, the technician only checks the deep veins, so a comprehensive evaluation including the superficial venous system is required to diagnose superficial venous insufficiency.

DVT and CVI: Symptoms of chronic venous insufficiency are 'chronic' and rarely of abrupt onset. Patients will report having longstanding symptoms of aching and pain, swelling and may have skin changes like venous eczema or brown discoloration. DVT can cause abrupt pain and swelling but has a variable presentation and the only way to exclude it is to get a Duplex venous scan. Seek a phlebologist or go to the ER