Calf interosseous vein thrombosis 7 mm, most people generally do not leave obvious sequelae, but a small number of patients may lead to local skin color changes, varicose veins and so on. Lower extremity venous thrombosis is one of the common clinical diseases, in comparison, calf interosseous vein thrombosis is relatively light, the impact on the lower extremity venous circulation is relatively small, and often the thrombus is small, the majority of people after timely anticoagulation and other treatments, usually will not leave obvious sequelae. However, in a small number of patients, interosseous vein thrombosis may progress and aggravate, and the thrombus develops and extends, thus affecting the venous return of the lower limbs, resulting in local skin pigmentation, skin sclerosis, and possibly superficial skin varicose veins and so on. When intermuscular vein thrombosis is detected in the calf, it is recommended that timely treatment be carried out under the guidance of a physician, so as not to delay the condition, so as not to cause the sequelae mentioned above, as well as complications such as pulmonary embolism.