The following conditions can all present with one or both testicles swollen:
Hydrocele (collection fluid within the scrotum)
Your husband will need to see a doctor to differentiate between all these possibilities.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.