Spider veins are caused by the same physical process that causes varicose veins. Â They are the precurser to the ugly bulging varicose veins. Â Basically vein valves that are starting to fail and stretching veins losing their pressure....a result of gravity and blood pooling. Â They are a warning sign of poor vein health and shouldn't be taken lightly. Â
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I can't say it often enough....wear compression stockings all day or anytime you are on your feet, especially when pregnant and all those pregnancy hormones are causing the veins to be more relaxed than normal! Â They must be at least 20-30 mm HG pressure to be effective enough to give enough compression to allow the vein valves to work effectively at getting blood back up the leg. Â Get a doctor's note, then go to a drugstore that has a certified compression stocking fitter on staff. Â You must be measured - I don't recommend buying off the shelf as you risk not getting the right fit (important for them to be effective). Â Most decent medical plans should cover them. Â If not, they are still a worthwhile investment if you can ensure a good comfortable fit (ie. they must be comfortable enough to wear). Â I recommend the Sigvaris cotton series, or Venosan makes some comfortable ones. (google them for info on their lines).
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Heat will make them worse too - so keep your legs cool. Â Lots of splashes of cold water to encourage circulation.
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Your mom could consider sclerotherapy (guided ultrasound injections to get rid of spider veins) if she wanted to improve the esthetic appearance.
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Good luck! Â I see all kinds of clients with awful legs....from not taking care of them in their younger years. Â This is your chance to help your legs for life.