Is it quite common for men to have menopause and what can I do to help him
Welcome to the forum!
It's really interesting that you've asked that question. I ran a Menopause Cafe recently, and I was asked the same question by a gentleman who came with his wife. I had heard of it, and knew it was called Andropause. Otherwise my knowledge is poor - I don't know how common it is. I haven't been able to find any support groups or forums to point you towards. There is information available online - and I'm sure you've already had a look at that.
The best information was on the NHS website, but there are other sites too.
I guess I would give the same advice to your husband or other gents, that I would give to women dealing with perimenopause/menopause. Make an appointment with your GP. I would print out the information I found on the NHS website, so that you can hand that over to help with the discussion. Write a list of symptoms and questions you'd like answered. How long have you had symptoms for example? Try and give examples of how it impacts on your life. Have a think about what kind of treatment you might be expecting. Take someone for support if that helps, and question anything you don't understand.
In terms of supporting your husband - I'm sure you're already doing it. Encourage him to talk. Listen to him. Try and learn as much as you can (I'll keep looking to see if I can find a contact for a forum or support group) and treat him the way you'd like to be treated yourself.
I hope you can persuade him to see his GP - men can be notoriously stubborn when it comes to seeking help. Good luck - hope he can find something to help him feel better.
Just after I sent that message I found this website - possibly helpful? The Andropause Society. Hope they can give you some information or support!