Talk to Gynecologist on Hasba Or Athra Disease

Asalam-o-alikum

My 2 months child dies yesterday and after death there was blue/black color on back, arms and ears. People are saying he got hasba. The child was very healthy even it looks like a 6 month child and no signs of rebulla, hasba, blue syndrome appears early. The motions were yellow and normal as we checked with doctor.

At the time of death, it was night so we were sleeping and there was no signs of struggle or anything. There was some blood whuch came out from nose or mouth and a white fluid like soap.

But before death there was no symptoms or anything, first we want to know whats reason of death can be and then how to cure mother/father from preventing her/his from this disease

Thank you