I had unsafe sex and one day later, I developed a rash on my body that is spreading, but without pain or itching. Could this be syphilis? (Hung, 37, Hanoi)

A 34-year-old man, initially misdiagnosed with psoriasis and unresponsive to treatment, developed a full-body rash and was later found to have syphilis after hospital tests.

A 32-year-old man experienced prolonged painful urination due to unsafe sexual contact with a female colleague after a year-end party.