Suggest Treatment For Herniated Disc With Numbness On The Fingers

My husband is 41 years old. He has a herniated disc in his neck (c-6, left side). He has numbness in his left-hand fingers. Sometimes his left arm/bicept. He also has some numbness, tingling and alternating hot/cold sensations in his legs. He also cannot ejaculate. He can get and maintain an erection, but his sensations are dulled. He believes this is all related to an injury from work. We have an appointment to see a neurologist, but it s a month away! Is he risking permanent nerve damage by waiting so long? What would you advise?