Men’s lower body hot and humid itching can be caused by physiological phenomena, fungal infections, scrotal eczema and other factors. 1. Physiological phenomenon: the scrotum has the role of regulating the temperature of the testicles, so that the testicular temperature is usually lower than the body temperature of about 2 ° C, so when the weather is hot, often through the scrotum skin cooling sweat to regulate the temperature of the testicles, which leads to the scrotum in a humid environment, not a good ventilation or cleaning can appear itchy performance. 2. Fungal infection: when the vulva is infected with mold, the mold can cause local skin infection of the scrotum, rash, blisters, pustules and other manifestations, pustules rupture can be formed after erythema, vesicles, etc., which can be manifested as hot and humid, itchy and other symptoms of the lower body. 3. Scrotal eczema: when scrotal eczema occurs, the symptoms of hot and humid and itching in the pubic area can also appear, local skin blisters, oozing and vesicles can appear, and can also be accompanied by itching symptoms. When men’s lower body wet heat itching should be timely medical treatment, under the guidance of specialists actively line appropriate treatment, help early relief of uncomfortable symptoms.