Dead or alive?
Because woodworm holes are the points-of-exit for adult beetles, the damage will already have been done by the time you notice them.
In these days of central heating and better ventilation, timber in houses tends to be dry, which is not what furniture beetles like, so quite possibly your woodworm damage took place a long time in the past. But it is worth checking if the woodworm are still active, because, if so, treatment is required.
So, first clean away any dust and frass from the area. Then wait a few weeks and check whether there are any new holes and any new signs of frass. Spring is a good time to start, as this is when woodworm are most active. If you want, you can cover the infected area with a thin layer of paint, or stick a sheet of paper over it. Emerging adult furniture beetles will bore through this new surface to reach the outside, leaving new holes for you to spot.
