How can dengue hemorrhagic fever cause low bp?

Dengue. There are many mechanisms by which this could occur, including severe anemia induced by the intravascular hemolysis, renal failure, vascular collapse, dehydration and other mechanisms. You need to get a medical education to understand this fully, and don't think that this is place in which to obtain that. Good luck.

Related Questions

What is the pathophysiology of dengue hemorrhagic fever?

Are you kidding? There is no way we can discuss pathophysiology in the short space allotted. People with homework assignments should go to the library or do their own web searches. We're here to answer clinical questions. Read more...

Pathophysiology of dengue hemorrhagic fever, what is this?

Dengue Fever. Hemorrhagic fever is the most serious manifestation of dengue fever. It can lead to circulatory failure and shock. In it there's a plasma leakage syndrome with increased vascular permeability, platelet count less than 100, 000, fever lasing 2-7 days, and spontaneous bleeding with microvascular fragility. There may be small bruises (petechiae) in the skin all the way to profuse bleeding. Read more...

If I have had dengue fever before, should I avoid traveling to countries with prevalent dengue as a rule to avoid hemorrhagic fever?

Mosquito control. For 100% certainty, avoiding travel to areas with dengue is all you can do. However, "avoid" is relative, depending on the reason and importance of travel. In dengue areas, the main thing is to be very compulsive about preventing mosquito bites with proper clothing, good repellant (DEET or picaridin, nothing else is reliable), and night time mosquito nets in some settings, e.g. sleeping in tents. Read more...
Yes. Dengue is caused by any one of four related viruses transmitted by mosquitoes. Recovery from infection by one provides lifelong immunity against that particular serotype. However, cross-immunity to the other serotypes after recovery is only partial and temporary. Subsequent infections by other serotypes increase the risk of developing severe dengue. Read more...

What is treatment for dengue hemorrhagic fever?

Supportive care. "supportive care, " meaning there's no specific treatment against the virus. You focus on treating the complications of the illness until it resolves. This can require hospitalization, sometime in an intensive care unit. Read more...

Can a person who had dengue hemorrhagic fever donate blood?

American Red Cross. recommends deferring blood donations for 6 months if you have had Dengue Fever. “In most countries, donors who have been infected with dengue virus are deferred for periods of up to 6 months or even longer if they have received blood transfusions.” REF: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2713854/
REF: http://www.americanredcrossblood.org/faq.html. Read more...

Is there a relation between kawasaki disease and dengue hemorrhagic fever?

No. Dengue hemorrhagic fever is caused by one of four different dengue viruses and it is transmitted by mosquitoes. The cause of kawasaki disease remains unknown. The symptoms and course of the diseases is also very different. Read more...