Athletes break out in rashes, fever after Tough Mudder race

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California health officials have issued an advisory after several people who participated in a Tough Mudder race last weekend got sick. 

Nearly two dozen people who ran in the Tough Mudder challenge at Sonoma Raceway on August 19 and 20 developed rashes with fever and reported muscle pain or nausea and vomiting, according to the Sonoma County Department of Health Services. 

"The Tough Mudder race involved extensive skin exposure to mud. Most affected persons have pustular rash, fever, myalgias, and headache," health officials said. "These symptoms could be indicative of a minor illness called Swimmers’ Itch, but they can also indicate a Staph infection or other more serious bacterial infection such as Aeromonas." 

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Sonoma County health officials issued an advisory about multiple cases of possible infections following a Tough Mudder competition at Sonoma Raceway last weekend.  (Courtesy of KTVU)

Athletes who competed in the race crawled through mud and water and climbed over and under obstacles like a barbed wire fence. Several contestants posted about their condition after the race on social media, complaining of a red rash with pus, fever and body aches.

"Anywhere on my body that touched the ground had red spots," participant Chris Palakos told local FOX affiliate KTVU. 

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Athletes shared photos on social media of angry red rashes they developed after the Tough Mudders challenge on August 19 and 20. (Courtesy of KTVU)

Tough Mudder participants shared pictures of their rashes