A common symptom of overflow incontinence is:

Overflow incontinence is primarily characterized by the involuntary leakage of urine that occurs when the bladder is overfilled, which leads to small amounts of urine escaping. This condition often develops when the bladder does not contract effectively, resulting in the inability to completely empty the bladder. As the bladder fills beyond its normal capacity, the excess urine may spill out, leading to symptoms such as dribbling or small amounts of urine leakage.

The primary symptom of this type of incontinence is indeed the small or occasional leakage of urine, which occurs without a strong urge to urinate. This is different from other types of incontinence, where a sudden and intense urge might be present. Individuals suffering from overflow incontinence may not even realize they have a full bladder due to nerve damage or other underlying conditions.

Thus, the correct answer emphasizes the typical presentation of overflow incontinence, as it highlights the characteristic symptom of small amounts of urine leakage associated with this condition.