Why Do I Have Varicose Veins?

Usually, the 160,000 kilometers of blood vessels in your body work incredibly smoothly. However, the forces of age, weight gain, and gravity can conspire to cause lumpy varicose veins.

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Sources:
https://www.circulationfoundation.org.uk/help-advice/veins/varicose-veins-endovenous-laser-therapy
https://www.fi.edu/heart/blood-vessels
http://www.bbc.co.uk/schools/gcsebitesize/science/21c/keeping_healthy/heartdiseaserev2.shtml
http://www.mayoclinic.org/diseases-conditions/varicose-veins/symptoms-causes/dxc-20178128
http://www.nhs.uk/conditions/Varicose-veins/Pages/Whatarevaricoseveins.aspx
https://www.circulationfoundation.org.uk/help-advice/veins
https://www.womenshealth.gov/publications/our-publications/fact-sheet/varicose-spider-veins.html#E
http://search.proquest.com/openview/056a60d02a64d891a387978bb5ddd6f4/1?pq-origsite=gscholar
http://www.hopkinsmedicine.org/healthlibrary/conditions/cardiovascular_diseases/varicose_veins_85,p08259/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3920493/
https://www.ncbi.nlm.nih.gov/pubmed/8616659

Видео Why Do I Have Varicose Veins? канала SciShow