title should read....."Redness/tiny bumps on head of penis."...not just a single bump.
Please stop worrying. What you have doesn't sound like yeast, and even if it were, it wouldn't cause nasal congestion. The numb feeling no doubt comes from worrying. Any heat will make red redder, as will friction. (Sunlight?) Medicated creams are either useless or even counterproductive. Please use only a bland moisturizer and consult a dermatologist for definitive diagnosis and treatment. And please don't look so hard at the texture of your skin. Such close scrutiny isn't needed when there is an actual disease, and it isn't doing you any good.
Best.
Dr. Rockoff