1. Itchy Red Welts Upon Waking Up
Developing small, itchy red bites grouped in lines or clusters on your arms, neck, or back after sleeping is a primary indicator of bed bug activity.
2. Tiny Blood Spots on Bed Sheets
Unintentionally rolling over fed bed bugs during sleep leaves tiny rusty or bright red blood smears on your bed linens, mattresses, and pillowcases.
3. Dark Fecal Spots on Mattress Seams
Bed bugs leave tiny dark spots (fecal matter) that look like black marker dots along mattress seams, bed frames, headboards, and baseboards.
4. Shed Skins and Translucent Eggs
As bed bugs grow, they shed their outer skins. You can find these translucent husks and tiny white eggs tucked inside mattress tufts and wooden bed joints.