Is it possible that itp in a child be caused by black mold?

Unlikely,,, Typically, itp follows a viral syndrome, and during convalescence for that process the patient developes bleeding and bruising. Exposure to black mold is unlikely to ppt itp.
Black mold & ITP. No one knows why itp occurs. There is no study that suggests it is caused by black mold.
Mold not cause. ITP can appear without an obvious cause. Children may get ITP after a viral infection. It usually disappears. Mold exposure is common, but not known to cause ITP.