Illness Anxiety Disorder

excessive concern and worry over a prolonged period of time about having or getting a serious illness despite a lack of physical bodily symptoms : preoccupation with one's usually normal bodily functions and sensations accompanied by the belief that they are signs of a serious or life-threatening medical condition

But if you're excessively worrying about your health—especially if you've seen your doctor and you've been tested or cleared of any issues―it might be worth speaking to a mental health professional. … Illness anxiety disorder, which is often referred to as health anxiety and hypochondria, is a very real condition that can be managed.

Sanskrit equivalent

व्याधिभीतिविकारः