A hypochondriac
If she is always sick get her to the hospital know and get her to eat protein foods get her better );
A person who is always down can be called a pessimist or the person may be depressed. Chronic depression is a matter for a professional to deal with. A pessimist is not sick, they're just annoying.
It is a word for a person who always thinks they are sick or might get sick.
Hypochondriac.
Medically speaking, a sick person is called a "patient" if they are under the care of a medical professional.
pediatrician
It is called a Corduct
it can make a person sick because they don't understand what they did wrong and always have proof before you open your mouth
They are called ill, sick, or diseased. In a medical setting the person is called "a patient" or "the patient".
A person who heals sick and ill people is called a doctor.
i kind of feel sick. but my stomach feels weird like it has flutters
Some religions call it a Sacrament but it really is an Ordinance, or even a Blessing given to the sick. Your question seems to be a statement of fact that sicj people will always be healed. This is not quite true. God will heal the sick if He feels the need to. He will at times let the person suffer so that through their suffering they or others may learn from their suffering. But God will not let a person suffer beyond that which they can stand. He is not a saddest but a kind and understanding God who knows what is best for us.