Syphilis is another type of bacteria that can form a rash on the stomach. It is during the secondary stage of syphilis that a rash on the stomach can form. It is also seen on the hands and feet.

A recent study offers a promising sign in syphilis incidence, a preventable and curable STI that has been surging across the ...

The prevalence of neurologic manifestations of syphilis reported among patients with early- and late-stage disease increased between 2019 and 2022.

More than two-thirds of these patients (68%) lacked typical syphilis symptoms, like a rash or chancre sore ... one-third of gay men with primary and secondary syphilis also had HIV.

That includes both Primary & Secondary (P&S) syphilis and early non-P&S syphilis. P&S syphilis diagnoses fell from 1,082 to 843. Early non-P&S syphilis diagnoses decreased from 775 to 714.