How do i know if i have this chancre-like on scrotum that is painful and itchy and other deform rashes. they are itchy, red, painful. could it be syphilis?

Syphilis: Primary syphilis does include genital sores called chancres, but they are usually painless. http://tinyurl.com/8fzkvwt they look like large, round bug bites that are hard, and usually show up 10-90 days after exposure. They also usually heal up within 6 weeks -- but if untreated, syphilis moves on to further stages. Please see your doctor for any questions about sores on your scrotum.