Some of the areas that are most likely to become sore are the neck, the back, the hands, the arms, the shoulders, the feet, the crotch, and the bottom. Muscles can also cramp. Some creams and ointments might provide a little relief. A lack of fluids under these circumstances is very dangerous. To avoid the problem in the future, ride only in the morning and in the evening during very hot weather.
Cold tiredness is caused by riding in low temperatures and getting chilled.
A headache can be a side effect. A more extreme variety, hypothermia, is a life-threatening lowering of the body's temperature, and can sometimes happen fairly quickly when not wearing sufficient clothing at high elevations or in the rain. The solutions are warmer clothing and getting into a warm environment. Hot and dry or hot and humid weather and a hot sun can cause rapid fluid loss. The symptoms are thirstiness, dizziness, and a washed-out feeling, although sometimes thirst is suppressed.