It basically means the same thing as 'ice water in your veins' which means a hardened or cold heart. It may be a compliment if you have done something heroic that few would venture too or, it could mean you don't seem to care about other's misfortunes.
"After he calmed down" could substitute for the phrase "after the fever had left his veins."
Intravenous is a route of administration where the drug or substance is injected directly into the veins.
abnormally swollen veins
"Severe" means great, massive, or very serious. "Bleeding" means that red stuff in your arteries and veins is coming out of your body.
basilic and sephalic
The scientific name for veins that are close to the surface is superficial veins. These are the veins you can see under your skin.
A grapevine has netted veins.
Varicose veins, swollen tortuous veins, are called varices in medical terms.
"After he calmed down" could substitute for the phrase "after the fever had left his veins."
dicotyledon
Varicose Veins.
The answer to that is varicose veins.
Varicose veins are swollen and distended veins, usually in the legs, resulting from pressure. Pregnancy is a common cause. Varicocities is another name. Varicose veins can occur anywhere, but the phrase is often used to mean varicose veins in the leg. Varicose veins can cause stasis or impaired blood flow.
Venopathy; phlebopathy
varicocele
Blood vessels
Somewhat blue; as, bluish veins.