It could result from dry skin, a rash/irritation caused by fabrics or soaps, improper cleaning or any number of sources including various infections or infestations.
Try cleaning thoroughly daily with warm water and a mild soap then rinse off every bit of soap residue before drying well. also, after any physical activity that might produce sweat, shower and clean well even if it means 2 or more showers a day. If th eskin feels dry, feel free to apply a scent free moisturizer.
Also, either go commando or be vary careful in your selection of laundry detergent and make sure all clothing is well rinsed before drying. And to top it off, beware of certain man-made fabrics when choosing underwear; nylon, polyester and even lycra can cause allergic reactions in some people.
Of course is if it's pubic lice or other little critters invading your space they would need to be removed in order to get relief. While these shoudl be visible and yoru doctro shoudl have seen them, he may have missed if he wasn't looking for them. If you see anything, there are ointments specifically for them and some require special laundry detergents or laundry additives to rid all your bedding and clothing of them. And as weird as it may seem, sometimes a good close shave is beneficial in getting rid of them.
I'd check yoruself out and see if anythign obvious presents itself. If nothing, give th ecurrent ointment a couple weeks and call the doctor back if it doesn't do the trick.My testicles itch like mad went to docs had tests and it wasnt fungus i am using a cream 1nce a day if idont t
Put a tight rubber ring on them .It will soon stopMy testicles itch like mad went to docs had tests and it wasnt fungus i am using a cream 1nce a day if idont t
Make sure you don't have crabs, some Doctors miss this. Try an antihistomine might help, also Olive oil and Baby oil can help as well.
It can be crabs, there are very effective creams fot this,m but before autodiagnosis got to the doctor... becasue if it isn't you don't know what this can cause to what you could actually have...