Tough Mudder officials
Tough Mudder officials also said they have reached out to all participants and opened an investigation to determine the cause of the illnesses. “The Tough Mudder race involved extensive skin exposure to mud,” the Sonoma County health advisory said. “Most affected persons have pustular rash, fever, myalgias, and headache.” Those symptoms may indicate a minor illness known as swimmer’s itch, but also could suggest a staph infection or a more serious bacterial infection such as Aeromonas , the advisory said.