The British Pest Control Association is urging householders to seek professional help quickly if Red Spider Mites invade their home.
The insecrs are only 0.5mm in size and do no direct harm in the home, but they can move indoors in large numbers and will stain walls and decorations if they are squashed.
For the majority of the year, Red Spider Mites are pale green with two dark spots on their back and turn an orange-red colour in autumn and winter.
Natalie Bungay, technical manager at BPCA, said: “For a suspected infestation of mites, we strongly recommend householders act immediately by contacting a pest management professional – DIY treatment of a mite infestation is unlikely to be successful.
“Female mites can invade homes and other buildings in spring and autumn. They will climb walls and seek out places to lay eggs or to hibernate.”