Lumps and swellings in the testicles are a relatively common symptom in boys and men, and can have a number of different causes. The vast majority of testicular lumps and swellings are caused by benign (non-cancerous) conditions that may not need treatment, but it's important to know what's normal for you and to see your GP if you notice any changes in your testicles so they can try to identify the cause.
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