A collection of these blood spots forms a larger dark spot, which is a bruise. The bruise may change color over time from dark red or dark purple to yellow or brown, depending on skin color. Repeat the process three or four times, for a total of 15 to 20 minutes. You may have to reheat the bowl of water between applications as it cools. Research suggests that vitamin C can help blood clots, which helps reduce the amount of bruising. Though vitamin K may help fade bruises, apply it topically instead of taking it orally, as the oral form is associated with more potential risks. This sequence of events is highly improbable. The women in New Zealand and Denmark may have experienced artery abnormalities early in life, putting them at a higher risk of stroke. Fill a microwavable bowl with water, and heat it in the microwave until it’s warm enough that you can just barely stand to keep a finger dipped in it. It should be warmer than bathwater, but nowhere near-boiling.