How long does it take for a man to notice he has a STD?

Symptoms usually appear after 2 to 3 weeks but could start earlier or much later. They include: one or more small painless sores or ulcers on the genitals. a blotchy rash and flu-like symptoms that may follow a few weeks later.

How long does it take for STD to show?

Depending on the specific pathogen (disease-causing organism) symptoms of STD may appear within four to five days — or four to five weeks. Some infections might yield noticeable symptoms even months after the initial infection.