Sometimes, systemic diseases such as chickenpox can spread to the genital areas, resulting in itching. Depending on the cause, penile itching may be associated with other symptoms such as. 1  burning,  discomfort.
http://www.medicinenet.com/penile_itching/symptoms.htm
An itchy testicle or groin area can be caused by a number of things, some of which are serious, but many of which are quite harmless. Some of the most common causes of testicle itching are a fungal infection, allergies, and certain types of bugs. Tinea cruris, commonly known as jock itch, is typically caused by a fungus called Trichophyton rubrum. This type of fungus also causes athletes foot and thrives in warm, moist areas.
http://www.wisegeek.org/what-causes-testicle-itching.htm
Scrotum Eczema or Dermatitis. It is characterized by severe burning-like itching, redness, scaling and thickening of scrotal skin. The common causes of scrotum eczema or dermatitis include allergens, irritants and stress.
http://buddymd.com/scrotum-skin-rash
1 Infected Zits Over Scrotum and Groin Area. 2  Yeast Infection Under the Breast – Candidiasis Rash. 3  Painful Swelling on Scrotal Skin. 4  Managing Patchy Skin Rashes That Itch.  Management of Skin Tag on the Scrotal Skin.
http://buddymd.com/scrotum-skin-rash
It is associated with heavy sweating and rubbing of inner thighs with scrotum in the groin area. That is why it’s commoner during conditions of excessive heat and moisture. The rash is raised, pinkish red, flaky, cracking, peeling and very itchy.
http://buddymd.com/scrotum-skin-rash
Symptoms of a male yeast infection include irritation, burning, itching, and pain in the groin area. Treatment usually consists of a topical anti-fungal cream and, possibly, an oral medication. Another common cause of testicle itching is contact dermatitis.
http://www.wisegeek.org/what-causes-testicle-itching.htm
Itchy, sweaty testicles and scrotum. If your testicles feel itchy, it is probably the scrotum that is itching - the bag of skin that contains the testicles, not the testicles themselves. Or, more often, it is the folds of skin behind the scrotum and in the groin that itch. The folds of skin behind the scrotum and in the groin hold sweat and are warm - which is just what fungal infections like. So it is not surprising that fungal infections are common in this area, and they can be very itchy.
http://www.embarrassingproblems.com/problem/testicle-problems/itchy-sweaty-testicles
Symptoms & Signs. Itching in the area of the penis or external genital organs occurs for many of the same reasons that itching occurs elsewhere on the body. Infections, including those that cause sexually transmitted diseases (STDs) are a primary cause of penile itching. Jock itch, the term used to refer to an inflammation and irritation of the groin area, may spread to the penis and result in itching of the skin of the penis. Further causes include fungal infections, scabies, pubic lice, tight undergarments, allergic reaction, skin friction, bacterial infection, and other conditions.
http://www.medicinenet.com/penile_itching/symptoms.htm
An over-the-counter topical spray can be used to treat jock itch. Cranberry pills can help with testicle itching caused by jock itch. Creams are available that treat testicle itch. Testicle itching may be caused by a yeast infection. A fungal infection on the skin surrounding the testicles is a common cause of itching.
http://www.wisegeek.org/what-causes-testicle-itching.htm
Causes and Management of Scrotum Skin Rash. Rash in the scrotal area may occur due to many reasons. Causes such as jock itch, eczema and psoriasis should be considered under its differential diagnosis.
http://buddymd.com/scrotum-skin-rash
what causes testicular itch
A fungal infection, allergies, and certain types of bugs are the causes of testicular itch. Testicular itch is caused by a fungal infection, allergies, and certain types of bugs.