In the UK, there are 4 types of woodworm; the Common Furniture Beetle, the House Longhorn Beetle, the Death Wall Beetle and the Wood-Boring Weevil. All invade and consume wood and they leave when they reach maturity. Early identification is crucial in stopping the problem because they will cause more and more harm and seriously weaken timbers, often leading to structural failure (of the timber). The signs you will see are:
Small round holes in your woodwork
Fine powdery dust around these holes
Crumbly edges to boards and joists
Tunnels within the timber
Weak or damaged timbers or flooring