8-year-old develops red streaks on legs after running outside: Mom shares video of the symptoms and urges parents to take this seriously

An 8-year-old came in from an afternoon of running around outside with something that looked, at first, like nothing much. A scrape, maybe a bug bite. Nothing that would make most parents think twice. But by that evening, thin red lines had started crawling up the skin of both legs. And that's when his mom knew something was wrong.

“Less than 12 hours after running barefoot outside, my 8-year-old developed lymphangitis from what seemed like a minor injury.