Hi Rosie,
there are some interesting answers on here, which really reflects what we know about the causes of Bruxism (teeth grinding). It is thought that the main causes are probably stress, lifestyle, diet or a combination of all three.
There are, as has been pointed out, lots of cures and potions advertised on the internet which may or may not help. My experience, and the combined experience of the users on my website seems to be that what works for one person may not work for another.
There are some simple things to try, which won't cost you any money and won't do you any harm either. You could get your husband to massage your neck and shoulders before bed, a warm bath before is said to help as well. You can try munching on some crunchy food such as an apple or a carrot stick or you can try a warm flannel wrapped around your face before bedtime.
If you suspect that your are suffering from Bruxism, go and see you dental practitioner straight away. It will gradually get worse and could develop into TMJ. I wish I had acted earlier, it would have saved me a lot of pain, sleepless nights and money before I found a Bruxism cure.
Bare in mind though that your dentist may prescribe a teeth guard for you to wear at night. This will NOT cure your bruxism but it will slow down the damage to your teeth.
Good luck and if you need any help feel free to e-mail me or visit my webpage or blog.
Regards
James...
James Marshall
w. http://www.nomoreteethguard.com
e. info@nomoreteethguard.com