I have one small abscess in my scrotum what should...

The treatment is based on medical examination by a dermatologist, it is recommended to avoid excessive sweating and wear cotton underwear, it is also advised to avoid using harsh soaps on sensitive areas, make warm water compresses to treat pain and pull out the pus in the abscess. Moreover, it is advised to take a on-spot treatment such as fusidic acid three times a day for 5 days, take antibiotic treatment such as augmentin 500 mg three times daily for 5 days. It is recommended to empty the pus present by the attending physician. Avoid rubbing or scratching the abscess to avoid spreading the infection.

Diagnosis depends on a medical examination and knowledge of the medical history, a clinical examination by a dermatologist, taking a sample of pus or pus formed, making a culture to find out the bacteria causing the abscess and its treatment, a comprehensive blood test and knowing the number of white blood cells

.Pain in the affected area
.Itching
.Swollen skin
.Drainage of pus
.fever 
.Fatigue and exhaustion

.We recommend you to take the described treatment and see a dermatologist

Regarding your reply :
inside abscess usually have outer end , if not , it will be made by surgical procedure with topical anesthesia
why is the surgical end is needed :
because in this way , internal infection content can be cleared and inner infection can be washed along with taking antibiotics 
will be there any specific complications ?
such a procedure is usually simple , and even pain is toleratable