Superficial thrombophlebitis due to VTE, chronic venous stasis
Trauma from peripheral venous access (iatrogenic or IVDU)
Medication infusion related
e.g. Aztreonam, vancomycin, phenytoin, amiodarone, dobutamine, concentrated potassium,
Infectious (septic or supparative<unk> /thrombophlebitis)
Associated with IVDU, prolonged PIV catheter use, strep/toxic shock syndrome, post obstetric/gynecologic surgery (septic pelvic thrombophlebitis)
Vasculitis
e.g. Aztreonam, vancomycin, phenytoin, amiodarone, dobutamine, concentrated potassium,
Associated with IVDU, prolonged PIV catheter use, strep/toxic shock syndrome, post obstetric/gynecologic surgery (septic pelvic thrombophlebitis)
Phlebitis
Superficial thrombophlebitis due to VTE, chronic venous stasis
Lymphangitis
Trauma from peripheral venous access 
Deep venous thrombosis
Medication infusion related
Colitis
e.g. Aztreonam, vancomycin, phenytoin, amiodarone, dobutamine, concentrated potassium,