Post contact itching is mostly secondary to protozoa, anaerobic bacteria or other sexually transmitted diseases.
Next Steps
Maintain a good lifestyle , this enhances your immune system. There are many microbes residing on our body in symbiosis. They become opportunists and invade to produce infection with poor immunity. General hygiene is a must. See a local doctor to start treating you with a reasonable medication
Health Tips
Nutritional
vitamin deficiency for
vitamin D is also a reason for bad immune system.