There are various proposed causes and risk factors for scrotal dermatitis. These include the following:
Psychological stress:
Stress can cause an itching sensation in the scrotum, which then creates a vicious cycle of scratching, skin damage, and itching.
Continuous exposure to heat and humidity: Such as in tropical or industrial areas; wearing thick clothing can also cause symptoms.
Exposure to certain irritant substances: These substances include grease, diesel, and dye in clothing.
Reaction to over-the-counter drugs: These drugs can include topical antibacterials, such as neomycin and gentamicin.
Skin irritation caused by condoms: This can be caused by the rubber in itself or nonoxynol spermicide.
Lack of specific nutrients: These nutrients include zinc and riboflavin.
Other health conditions: Including HIV and other types of infection.
Specific genes may also make people more prone to eczema. A 2017 study found a link between the genes that cause asthma, hay fever, and eczema.