When lower-extremity superficial thrombophlebitis is seen, the possibility of concurrent deep venous thrombosis must be considered. Swelling of the extremity is the most specific physical sign, and its presence requires diagnostic evaluation. Doppler ultrasonography is generally the preferred diagnostic test. Patients with normal color-flow study results should be treated with elevation and bed rest. Repeat color-flow Doppler ultrasound studies should be performed in 3 days if symptoms persist but sooner if symptoms worsen.
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