But they should pay attention to any changes and see a doctor if swelling, lumps or other symptoms develop.

如果对任何已有的变化有所警惕，如浮肿、肿块或其他症状，这时候就应去看医生。

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If sore mouth symptoms do not improve in 7 days; if irritation, pain or redness worsens; or if swelling, rash or fever develops, see your doctor or dentist. Do not exceed recommended dosage.

如果口腔疼痛症状在7天内没有得到改善，如果发炎，疼痛，红肿加重，或是身上肿胀，皮疹或发热出现，请去就医，不要超过推荐剂量。

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If you are infected, you can pass on these diseases before you see any symptoms, such as a rash or swelling.

如果你被感染，在你看到任何症状之前就可以传播这些疾病，如皮疹和肿胀。

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However, similar symptoms may also occur if there's an injury, swelling or infection of various parts of the male anatomy, so it is important that a physician make the diagnosis if something abnormal is found on a self-exam.

CNN: Should teen boys check testicles regularly?