Hello,
Severe itching in the shaft and groin area is commonly due to
fungal infection. You are suggested to take care of your personal hygiene, wear cotton loose fitting clothes, take regular showers, do not share your toiletries and wash your clothes, bed sheets frequently in warm water.
Keep your groin area clean & dry. Fungal infection grows in moist sweaty warm areas. Avoid wearing pants made of fabric that have ventilation issues You can apply ointment
Clotrimazole in the area affected for relieve. You can take a course of anti-fungals (
Fluconazole). You may have to repeat the course if it is chronic.
Since you are sexually active, you are suggested to get
STD tests done to stay on the safer side. If the tests come positive you will be treated with antivirals and antibiotics.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician