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What are the symptoms of a syphilis infection?
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The main symptom of syphilis is a painless sore, called a chancre. Other common symptoms include rash, fever, fatigue, swollen lymph nodes, and headaches. In more serious cases, people may experience neurological problems such as confusion, memory loss, or difficulty walking. Syphilis can also cause damage to internal organs, including the liver, kidneys, heart, and brain.