How do I kno when I have a disrse?

Know thy mind & body. Every person needs to have good self awareness. He needs to know his own mind and his body well. If there is a feeling of a disturbance in his mind or body, then it is time to see a doctor or two. Annual check-ups and other screening tests help find diseases that are harder to detect, or that are bad if detected after symptoms start. Unfortunately, some diseases are not easily detectable.