Reading in bed also causes eyestrain. A headache is not a disease. Protein is important for healthy hair. Indigestion can occur after an unpleasant incident. Most doctors can give their patients influenza vaccines.
Stress is a common cause of insomnia.
A charley horse is a leg cramp . A cramp does not usually last long. Rheumatism causes stiffness of muscles and pain in joints. Eating different sugars and starches might cause cavities. Squinting often indicates a visual problem.