One more effect of The use of the internet affects Thai adolescents is Health illness. The use of the Internet for a long time to make time to exercise less and there is also a behavior through exhaustion, waking up early to hurry to play the Internet. Result in physical symptoms that your body does not know the cause such as, headache, back pain, joint pain, abdominal pain and eye pain. By playing the game that make the heart beat faster, Blood pressure rises it is associated with obesity in children and adolescents with increasing current. Additionally, the game online may stimulate seizures. The types of epilepsy are also sensitive to light. Which is inducing seizures by the game online easily and risk of contracting infectious diseases. If the computer has not been maintained very well. It became a source of germs, so the teenagers who use the Internet is still lacking health care behavior, proper hygiene, Lack of relaxation, and lack of nutrients. It's very easy to be infectious diseases.