“You may develop a high temperature (fever). If a blood clot develops inside the inflamed part of the vein, the vein may then feel hard or knobbly.
“The blood clot is usually of little concern, as it is small. There are other veins which carry the blood and bypass the blocked vein.”
However, there are some symptoms of superficial thrombophlebitis that require immediate medical attention.
One such symptom is a “hardness” that spreads up your inner thigh towards your groin or is around the back of your knee or calf.