He might notice painless sores during the primary stage of injection.
A bacterial infection called syphilis is typically spread through sexual contact. The disease typically begins as a painless sore on the mouth, genitalia, or rectum. By touching these sores on the skin or mucous membranes, syphilis can be transmitted from one person to another.
The syphilis bacteria can be dormant in the body for decades after the initial infection before coming back to life. Early syphilis can sometimes be cured with a single penicillin injection.
Syphilis can be fatal if left untreated because it can cause serious damage to the heart, brain, or other organs. Mothers can also transmit syphilis to their unborn children.
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