Dampness and fatigue in the scrotum can be caused by prostatitis, too frequent sex or eczema in the scrotum. 1. Prostatitis: Prostatitis can be triggered by bacterial infection of the prostate. After being stimulated by inflammation, the patient may have symptoms such as scrotal dampness, fatigue and weakness, and may be accompanied by urinary urgency, frequent urination, and burning anus. 2. Too frequent sex: when male patients have sex too often in their daily life, it may cause stimulation to the kidneys and make patients fatigue and weakness. If you don’t do a good job of hygiene, it can also lead to semen staying in the scrotum area, causing scrotal dampness. 3. Scrotal eczema: prolonged sitting may cause scrotal eczema, leading to scrotal humidity, when the condition is serious, eczema can cause stimulation of the entire skin of the scrotum, causing fatigue and weakness. Scrotal dampness, fatigue and weakness may also be caused by other reasons, such as scrotal inflammation or varicocele, etc., should go to the hospital in time to clarify the cause of the disease, and choose the appropriate method of treatment.