Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Get emergency medical help for sudden, severe testicle pain, especially with swelling, nausea, vomiting, or a testicle sitting higher than usual.
These symptoms may be caused by testicular torsion, in which the testicle twists and loses its blood supply.
A varicocele that appears suddenly, is only on the right, or stays full when you lie down should also be assessed promptly.
Torsion requires urgent treatment and should not be assumed to be varicocele pain.
Urgent assessment is also appropriate after a scrotal injury with severe pain or swelling, or if pain is accompanied by fever, redness, and feeling unwell.
Arrange a routine medical appointment if you notice a new lump, swelling, enlarged veins, ongoing ache, or a change in testicle size.
An examination can confirm whether the finding is a varicocele and rule out other causes.
Seek routine follow-up if symptoms are becoming more frequent, pain is interfering with daily life, or you have concerns about puberty, testosterone symptoms, or fertility.
Every sign above is quoted from the sofidex article on Varicocele. If you are not sure, err upward — it is always reasonable to be checked.