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* Thirst
* Dry mouth
* Dark urine
* Reduced urination
* Dizziness
## Do Visible Veins Mean High Blood Pressure?
Usually not.
High blood pressure generally does not make superficial veins suddenly bulge.
In fact, hypertension often causes no obvious symptoms at all.
The only reliable way to know your blood pressure is to measure it.
## Do Visible Veins Mean Poor Circulation?
Not necessarily.
Healthy people can have extremely visible veins.
Poor circulation is more likely to cause additional symptoms such as:
* Persistent coldness
* Numbness
* Pain with activity
* Skin discoloration
* Slow-healing wounds
The presence of veins by itself does not diagnose circulation problems.
## Who Has a Higher Risk of Blood Clots?
Extra attention may be appropriate if sudden vein changes occur in someone with risk factors such as:
* Recent surgery
* Prolonged bed rest
* Long-distance travel
* Previous blood clots
* Certain cancers
* Pregnancy or recent childbirth
* Estrogen-containing medications
* Smoking
* Obesity
* Some inherited clotting disorders
Having one risk factor does not mean a clot is present, but it changes how seriously new symptoms should be taken.
## When Should You Make a Routine Appointment?
Consider seeing a healthcare professional if:
