Husband develop nightly behavior, past2 months. Extreme irritability, anger, restlessness&sore back, punching in his sleep! Does not remember in morning.

Restless leg syndrom. During sleep, symptoms like restlessness, irritability, anger, etc may be seen in restless leg syndrome for one. Sounds like a nightmare or night terror as well. Please have him consult his primary doctor to create a diagnosis. He may need sleep studies or psychotherapy as well.
REM SLEEP DISORDER. This is most likely are rem sleep behavior syndrome. Patients move and act out the dreams in their sleep. There is some risk of injury. A sleep specialist can perform a sleep study and diagnosed the condition. This is easily treatable with medications.