最近睾丸上长了一个小囊肿，直径半厘米，表面有点红，轻捏有酸痛感，请问要不要看医生啊？会是什么病吗？ 

回答： 
Possibilities include folliculitis and epidermal inclusion cyst. You can wait for one or two weeks. If it persists or get worse, then go see an urologist.