Bismillaah
Are there bad signs that can be seen on the body of the dead Muslim? What are they?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

The body of a deceased person may undergo some changes that result in repulsive marks, such as the blackness of the face or the like. These marks, however, should not be taken as certain evidence on his evil deeds or bad end, since they may have been caused by a pre-death disease or by other factors as we explained in Fatwa 117016. For further information, please refer to Fataawa 119711 and 85432.

Allaah Knows best.