Final answer:
Secondary syphilis is characterized by a rash and other symptoms, such as fever and swollen lymph nodes. If untreated, syphilis can progress to the tertiary stage, which can cause serious damage to internal organs and even death.
Step-by-step explanation:
Secondary syphilis is the second stage of the disease, characterized by a rash that affects the skin and mucous membranes. The rash often starts on the palms or soles of the feet and spreads to the trunk and limbs. It may take many forms, such as macular or papular. Other symptoms may include fever, malaise, and swollen lymph nodes. If left untreated, syphilis can progress to the tertiary stage, which may lead to damage to internal organs, paralysis, blindness, seizures, and dementia. The damage can be severe enough to cause death.