Contact Us

Spider veins are broken and dilated capillaries that appear blue, red or purple and that lay just below the surface of the skin, typically on the thighs, calves, and ankles

What causes them?

Spider veins occur due to an incompetency of the valves within the veins of the lower extremities. As the veins work to carry blood against the pull of gravity, the blood passes through valves throughout the veins meant to ensure the blood flows upward to the heart and not back down into the legs. When these valves get faulty, give out or become less effective, over the course of the day, the blood pools in the legs, causing the legs to swell, get tired, burn, ache and cramp. And giving us those unsightly fine webs of red, purple, and blue. They can be quite distressing but are rarely dangerous.

Ultimately, the problem of spider veins is one of gravity, multiplied, and exacerbated by the various risk factors that we will discuss below.

Spider vein risk factors

There are several common risk factors associated with spider veins:

  • Genetics, medical history, and familial history: If several people within the family had spider veins, others are likely to get it. Genetics are considered the number one cause of spider veins. Family history contributes up to 90% of the possibility of contracting spider veins.
  • Birth control pills, particularly those containing estrogen.
  • Pregnancy, due to weight from the fetus and increased blood flow. Increased blood flow coupled with the increase in weight places more pressure on the legs during pregnancy.
  • Hormonal changes.
  • Increasing age. Valves within the veins weaken over time.
  • Prolonged standing, sitting, and periods of inactivity contributes to developing spider veins. Veins in the legs work harder to pump blood upwards to the heart when one is immobile and vertical for extended periods. Because the flexing and motion of leg muscles aid blood flow, when these muscles aren’t active and in motion the flow of blood back to the heart weakens.
  • Smoking cigarettes constricts and weakens the blood vessels contributing to spider veins.
  • Sun exposure can contribute slightly.
  • Weight. Staying as close as possible to your ideal weight will help prevent them.
  • Gender. Both men and women experience spider veins though they do tend to be experienced most often by females.

What is the difference between varicose veins and spider veins?

Spider veins are a subclass of varicose veins. They present as non-raised, fine purple veiny or rooty looking threads or webbing. Spider vein is a general term that refers to small dilated blood vessels on the skin or mucous membranes of various parts of the body. They are quite common and unless very widespread or accompanied by hyperpigmentation, are rarely a sign of an underlying medical condition or disease. Varicose veins on the other hand, are bulging and raised above the surface. Varicose veins are often accompanied by pain and discomfort in the legs, aching, cramping, burning, throbbing, heaviness, skin discoloration, and skin ulcers.

How are spider veins treated?

Avalon Laser is a San Diego spider vein treatment center specializing in removing spider veins with IPL, photorejuvenation, and photofacials that painlessly employ radiofrequency energy to remove spider veins of all kinds on any part of the body.

Back to Blog

Schedule a consultation

Accessibility: If you are vision-impaired or have some other impairment covered by the Americans with Disabilities Act or a similar law, and you wish to discuss potential accommodations related to using this website, please contact our Accessibility Manager at 760-891-5353.