Take the next step - people who can help. Dr Andy Smith , Tony Lycholat , Dr Sam Stear , Dr Gill Jenkins , Fiona Farrell , Fiona Hayes , Heather Kinnin. The BBC is not liable for the contents of any external internet sites listed, nor does it endorse any commercial product or service mentioned or advised on any of the sites. Always consult your own GP if you're in any way concerned about your health. A weekly selection of health and fitness sites to visit.
Computers have health risks - get tips for healthier surfing .