5mm long, and looking like a small, flat red-brown disc, the common bed-bug is found in human habitations world-wide. It feeds on the blood of humans, emerging at night from cracks in furniture joints, bed frames, wallpaper and skirting boards to bite humans, its principal host, and to leave its characteristic speckled excrement. Bed bugs leave a characteristic almond-like smell in rooms where they are active. Bites can be painful, giving rise to hard whitish swelling.
Insecticidal spray, followed by complete fumigation (this is not a DIY treatment).