Classification and types of phlebitis

Phlebitis is generally divided into four categories: mechanical, chemical, bacterial and thrombotic. According to the severity of symptoms, it can be generally divided into 5 grades, which are grade 0 - 4. Grade 0 means no symptoms, grade 1 is local redness, grade 2 is local redness and pain, grade 3 is based on grade 2, and the vein can also touch a hard rope. Grade 4 is based on grade 3, with local skin ulceration and suppuration.