The abnormal accumulation of a water-like substance called cerebrospinal fluid in the brain is called hydrocephalus. The word Hydrocephalus comes from the Greek 'hydro' meaning water and 'cephalus' meaning head.
Severe body aches and pains, frontal headaches and red eyes. If you have been working outdoors where there is stagnant water even in highly residential areas, don't ignore it as the flu, but seek medical help immediately.