Red spots on the skin: could syphilis be behind it?. The appearance of the redness suggests burn blisters or skin blisters filled with blood.
The latter arise from unusual mechanical stress, for example from shoveling snow for a long time. The sexually transmitted disease syphilis can also cause skin problems in the form of a rash. This can occur anywhere on the body, but usually on the palms of the hands and soles of the feet. It is not yet known what problem actually causes the red spots on Trump's hand.