The common causes are

  • Defective valves from birth.
  • Pregnancy.
  • Thrombophlebitis.

They are one of the commonest medical conditions known to mankind. This is the price we pay for our erect posture. Over 80% of the world’s population suffers from telangiectasia or reticular varicosities. One study showed the trunk varicosities as 40% in men and 32% in women.