What are booklice? Booklice are tiny, soft-bodied insects that thrive in damp, warm places. You might spot them in food cupboards, paper stacks or around window frames. Despite their name, they are not true lice and do not live on people or pets. People may wonder, though: are booklice harmful or just a nuisance?

Are booklice harmful to humans?

Although they look unsettling, booklice do not bite or sting. They carry no diseases and pose no direct threat to your health. Even so, they can trigger concern when they appear in large numbers indoors.

Sometimes, people mistake them for other insects like bed bugs or fleas. This confusion can cause unnecessary worry. In reality, booklice do not infest people or pets. Nevertheless, their presence often suggests a moisture issue in your home.

Can booklice damage property or belongings?

We frequently see booklice in plaster, wallpaper or behind skirting boards. However, they are especially common in humid kitchens and bathrooms. Since they feed on microscopic mould, they tend to gather where condensation or leaks occur. They often appear in new homes or recently redecorated rooms due to residual moisture.

So, are booklice harmful to the home? While they do not chew wood or furniture, booklice may feed on damp paper, wallpaper paste or stored food. They can ruin packaging in pantries or spoil dry goods like flour and grains. Although rare, large populations may also damage stamp collections, old books or documents stored in humid conditions. However, they do not destroy furniture or fabrics like moths or carpet beetles.

What can you do if you find booklice? First, check for signs of excess moisture or poor ventilation. Booklice will not cause lasting damage, but their presence means you should address humidity.

We recommend using a dehumidifier or extractor fan in kitchens and bathrooms. Also, store dry goods in sealed containers to reduce the risk of contamination. Be sure to clean affected surfaces with mild detergent to remove mould spores as well.

Although booklice do not spread far, you may need professional advice if they keep returning. We often trace the problem back to insulation, plumbing leaks or poor air circulation. If you have tried drying and ventilating the area with no success, our professional pest control service in London can help. We inspect affected areas and identify hidden moisture sources. Then, we advise on long-term solutions and, if needed, apply safe treatments.