No it causes them to dilate (vasodilation)
Mosquito saliva contains proteins that trigger an immune response in the body, leading to the release of histamine. Histamine causes blood vessels to dilate and become leaky, resulting in swelling and itching at the bite site.
When you drink alcohol, it can cause your blood vessels to dilate, leading to nasal congestion and a stuffy feeling. This can be due to histamine release or an allergic reaction to certain components in the alcohol.
The heart is a pump and move blood through the blood vessels.
Histamine also causes acid indigestion, diarrhea, flushing, heart pounding, headaches, and can even cause the blood pressure to drop suddenly.
Piriteze (Cetirizine) and Sudafed (pseudoephedrine) is a combination of an antihistamine and a decongestant used to treat the symptoms of seasonal or yearly allergies. Antihistamines work by preventing the effects of a substance called histamine, which is produced by the body. Histamine can cause itching, sneezing, runny nose, and watery eyes. Decongestants produce a narrowing of blood vessels. This leads to clearing of nasal congestion, but it may also cause an increase in blood pressure in patients who have high blood pressure. Hope this helps.
Inflammation can lead to the release of chemicals that cause blood vessels to dilate and become more permeable. This can result in increased blood flow to the affected area and the leakage of fluid and white blood cells into surrounding tissues, contributing to swelling and tissue damage. Chronic inflammation can also lead to the thickening and narrowing of blood vessels, increasing the risk of cardiovascular diseases.
No. blood vessels cause headaches
increased heart rate & blood pressure, damaged blood vessels in the brain that can cause an irregular heartbeat that can cause cardiovascular collapse or death, permanent damage to blood vessels of the heart, & heart attack.
The organism not only damages the blood vessels by causing them to leak, but also causes clotting inside the vessels.
During menstruation your body produces prostaglandins that cause the uterus to contract in order to push out menstrual flow, if prostaglandin production is too high it causes the blood vessels to contract so cutting off oxygen flow to the muscles in the uterus temporarily. Essentially it's similar to a heart attack: blocked blood vessels limiting blood flow and oxygen.
Blood vessels can feel the shear stress caused by blood flow. When shear stress increases the blood vessel responds and the diameter becomes larger. Thus in short, changes in blood flow might cause blood vessels to change diameter.
yes sir