There are certain diseases that are subtle. They are present and acting inside your body but you would not feel its effect unless something drastic takes place. And that thing can make you hospitalized or inactive for a month or so. Let alone the immense amount of psychological distress that it would create.
But the great thing about our body is that it tries to indicate any problem that it is going through beforehand. So, if you have any these bodily symptoms, then you might be suffering from some major disease internally. Always keep a check on your body and look out for these signs: