Hi,
Palmar rash may be a manifestation of syphilis, a bacterial infection such as staphylococcus, Rocky Mountain Spotted fever, West Nile
virus infection, HIV manifestation , sarcoidosis and hematologic disease. Hematologic diseases may present as a palmar rash due to the small pinpoint bleeding usually noted. The bleed however which may manifest as rash like should also be noted in other parts of the body.