Veins help regulate your body temperature. When the body temperature is too warm, the veins will pop out. Veins will also be more prominent in those who have less body fat, and in the elderly because their skin is thin.
They pop or stick out because there is blood pressure inside of your veins.
because you are either warm or stressed, they will go down,
Sometimes this is the case but not always.
Depending on how far they stick out, nothing, you're working out and the blood is flowing.
If they are big and kind of stick out a little, they might be varicose veins. Lower extremity veins normally have valves in them to help pump blood from the legs back to the heart. In varicose veins, these valves have stopped working. Varicose veins can be potentially dangerous and can lead to blood clots. I'm pretty sure surgery is the only fix.
I don't really know, but I really think you should go to a doctor.
I think it makes the veins on the arm stick out more, for an easier injection.
When men excersize continuously veins stick out and they are more green and notisable. The body temperature increases significantly so your body is trying to cool itself down it does it through many means by sweating and panting and sometimes through your veins so do mot worry your body is cooling you down.
There are three major categories of veins: superficial veins, deep veins, and perforating veins. All varicose veins are superficial veins; they lie between the skin and a layer of fibrous connective tissue called fascia.
There are three types of veins, superficial veins that are just beneath the surface of the skin, deep veins that are large blood vessels found deep inside muscles, and perforator veins that connect the superficial veins to the deep veins.
Pulmonary veins
Yes they do have veins because when i eat them have black veins :/
Varicose veins.
Veins