You can sometimes reverse testicular shrinkage from testosterone as long as it's treated early enough.
Treatments for reversing testicular shrinkage from testosterone include reducing testosterone and then replacing the testosterone with other medications or stopping testosterone therapy.
The most effective treatment for reversing testicular shrinkage from testosterone is human chorionic gonadotropin.
Human Chorionic Gonadotropin is a peptide that can mimic the effects of the luteinizing hormone which triggers the production of testosterone.
Human Chorionic Gonadotropin can also help to restore the body's natural production of testosterone and reverse testicular shrinkage.
Gonadorelin is also another medication that can help with testicular shrinkage.
And in some cases if you're on testosterone therapy you may need to stop the testosterone therapy to reverse the shrinkage of your testicles.
Although if your testosterone levels were already low before you started testosterone therapy then your body may not be able to produce enough testosterone on it's own.
In severe cases of testicle shrinkage surgery may be needed to remove the atrophic testicle.