Given the data you provided (not feeling hot/cold on the penis, desensitized glans penis, tingling sensations after using penis extender that are already reduced), it seems likely that you might be experiencing small fiber peripheral neuropathy. Small fiber peripheral neuropathy is a disorder of the peripheral nerves that affects small somatic fibers, usually the ones responsible for sensations. The sensory nerves very close to the skin are usually affected. The most frequent symptoms include: insensitivity to hot/cold, tingling, numbness and muscle weakness. In other cases, strong pain might be experienced.


There are several reasons for small fiber peripheral neuropathy. In your case, it might be trauma done to the nerves. The complete mechanism of small fiber peripheral neuropathy is not well studied and the treatment options are not wide.


You might want to visit a neurologist and ask for his opinion about the treatment options of small fiber peripheral neuropathy. It is good that the symptoms are reduced, and the condition is much better than it was before, but you might consult just to have an insight into your options and the future prognosis of the condition.