The symptoms of malaria commonly develop within 10 days to 4 weeks following the infection. In some cases, symptoms may not develop for several months. Some malarial parasites can enter the body but will be dormant/inactive for long periods of time. Common symptoms of malaria include: shaking chills, high fever, copious sweating, headache, nausea, vomiting, abdominal pain, diarrhea, anemia, muscle pain, convulsions, coma, bloody stools