Penile yeast infections occur for the same reasons that any other type of yeast overgrowth occurs. When the environment is ideal and yeast is introduced to the penis, an infection can occur. Dr. Todd B. Nippoldt, an endocrinologist with Mayo Clinic, points out that sexual transmission of yeast is possible, but men are more likely to get an infection of this type due to having diabetes, an impaired immune system or from prolonged antibiotic use. Symptoms of a male yeast infection are similar to those of other fungal skin infections.
Visible Signs
The penis may display one or several signs of fungal infection as the yeast begins to irritate the tissues. Common symptoms include redness with or without little blister-like bumps. The University of Maryland Medical center suggests the irritation from a yeast infection can appear as a red patch or lesion on nearly any surface of the skin. Any physical signs of an infection require medical attention to ensure some other sexually transmitted disease is not to blame.
Discomfort
The head of the penis and the shaft may become extremely irritated. It can burn or itch. Urinating may be painful as the urine passes over the irritated skin. Anti-fungal treatment can include oral medications as well as topical creams. Some creams contain ingredients that not only fight the fungus but also provide relief of irritation and pain. It is also important to keep the penis clean and dry to prevent further infection.
Discharge
If the yeast has infected the urethra or inner part of the penis, it can cause oozing. The discharge can be white and clumpy. If medical care has not already been sought at this point, then discharge is a clear sign that treatment is necessary. Sexual contact can spread the yeast from the penis to another person and should be avoided until the infection has resolved.


