Your GP may advise a short period of rest, perhaps with an ice pack. But long periods of inactivity can worsen the injury by weakening affected muscles or tendons. Painkillers prescribed by your GP may be necessary. But they can conceal the pain, and prevent your body's natural alarm bells from warning you about potentially irreparable damage.
For persistent pain, the GP is likely to refer you to a specialist.
You may also need a doctor's letter to your employer, asking for alternative work on lighter duties.
A new system of GP medical statements was introduced in April 2010. The new 'fit note' – rather than sick note - can either indicate that a person is 'not fit for work' or that they 'may be fit for work taking account of the following advice'. The GP can recommend a phased return to work, altered hours, amended duties or workplace adaptations. The TUC website has more information on the new fit notes.