crisis vampire
A person stimulated by a medical crisis to be overly concerned and nosy, requiring reassurances and time and energy you don't have as to your outcome that no one can answer.
I didn't hear from them for months and when i got sick, they started calling and messaging all the time with their cloying need for comfort and curiosity as to what the "real story" about my disease was. My illness gave them energy: crisis vampires!!!