Likely bed bug nymph

Indoor, near sleeping areas; hides in mattress seams, bed frames, and nearby cracks.

Feeds on blood, mainly from humans, typically at night.

Flat, oval, wingless insects that hide in crevices and emerge to feed; nymphs molt several times before adulthood.

Bites can cause itchy skin reactions and infestations are difficult to eliminate; they are not known to transmit disease. The photo is too small to confirm identification, so inspect for additional signs such as shed skins or dark spotting.