Blood pox on the top of the scrotum may be related to scrotal inflammation, scrotal eczema and allergies, the specific causes need to be diagnosed after medical examination. 1. Scrotal inflammation refers to the inflammatory disease of the scrotum skin and subcutaneous caused by Staphylococcus aureus, Pseudomonas aeruginosa and other pathogenic bacteria, often due to scrotal injuries, diabetes mellitus, urinary extravasation and other pathologic factors. Typical symptoms are red, itchy and painful scrotal skin, rashes and blisters, which may be accompanied by systemic symptoms such as chills and fever. 2. Scrotal eczema is a chronic inflammatory disease that occurs in the skin around the scrotum. Typical symptoms are erythema, papules, blisters, flushing or swelling, often accompanied by intense itching, recurrent. Scrotal eczema is mostly limited, polymorphic, unclear boundary, easy to occur on both sides and symmetrical distribution. 3. Due to the presence of certain allergens, after contact with these allergens, the patient’s scrotum can appear red, swollen, itchy, flaky symptoms, such as untimely treatment can develop into blood blisters. In this case you need to remove the allergens, common therapeutic drugs such as cetirizine, mainly used for anti-allergy treatment. All the above drugs need to pay attention to the side effects and adverse reactions of drugs, please use the above drugs under the guidance of a doctor. If you find scrotal blood pox, you should seek medical treatment in time, not unauthorized use of medication, so as not to delay the condition. Pay attention to rest on weekdays, quit smoking and drinking, and keep a regular routine.