If you're doing a cleanse, symptoms like this come up for a while as the body cleanses itself. One of the causes of spider veins mentioned was hormone changes. A cleanse can well affect hormone changes. By the way, hormone changes and toxin congestion in the blood apparently, can affect emotions, such as pessimism. If you've ever taken the pill or been exposed to estrogen-mimicking compounds, which are ubiquitous in plastics and foods and drinks packaged in them etc and probably in many medications, any of those could be the cause of your temporary spider veins.
If you've also gotten liver spots, this suggests the possibility that your liver was toxic and that could be the source of the spider veins as well as the liver spots. As the cleanse cleans your liver, the toxins leave via the blood vessels and, if the kidneys are overworked, the skin can be used as an additional temporary exit point.
If the blemishes linger, there are numerous natural remedies that can encourage them to clear up. Hydrogen peroxide is sometimes effective on liver spots, according to Dr. Douglass. Raw sliced garlic, cayenne, aloe vera, wintergreen oil and other essential oils etc may help both.