Infectious diseases are communicable diseases caused by the infection of pathogenic microorganisms or parasites, whereas eczema is an allergic reaction of the body itself and thus is not contagious. In daily life, whether it is through conversation, sharing utensils or bath items, or even direct contact with the rash of an affected individual, transmission does not occur, and family members of the patient do not need to take any protective measures. If you are around someone with eczema, there is no need for caution or discrimination, which is completely unnecessary. Some might worry whether scrotal eczema can be transmitted sexually. Sexually transmitted diseases are primarily transmitted through sexual contact or activities similar to sexual behaviors, while scrotal eczema is a common inflammatory reaction of the scrotal skin, triggered by a delayed-type hypersensitivity reaction due to both internal and external factors, and it is not contagious. Therefore, scrotal eczema is not a sexually transmitted disease.