Not Dandruff possibly fungus

I was wondering, I get this weird layer on my skin of something where my facial hair (goatee & sideburns) and head hair is, even my eyebrows. It's a yellow color, kinda waxy film, itches alittle. I started using Head n Shoulders, it helps but not completly, moisturizers don't seem to work, also I have the same kinda problem but on my testicle hairs, the hairs are a yellowy color with a film over them. The problem on my head is more on the skin then the hair, but on my testicles it's the hair. I shower twice a day because of reacurring heat rash so it can't be my hygene, any suggestions would be appreciated

[Dr Santos]

Hi,

Seborrheic dermatitis is a disease that causes flaking of the skin. It usually affects the scalp and  other parts of the body, such as the face and chest, and the creases of the arms, legs and groin. Seborrheic dermatitis usually causes the skin to look a little greasy and scaly or flaky. This may be related to hormones or the cause might be a fungus, called malassezia. This organism is normally present on the skin in small numbers, but sometimes its numbers increase, resulting in skin problems.

The treatment of seborrheic dermatitis depends on its location on the body and the  person's age. When you use a dandruff shampoo, rub the shampoo into your hair thoroughly and let it stay on your hair and scalp for at least 5 minutes before rinsing. This will give it time to work.

Take care and keep us posted.