Likely bed bug (nymph or adult)

Hides near sleeping areas—in mattress seams, bed frames, furniture, and cracks—and emerges to feed on people at night.

Feeds mainly on human blood; may also bite other warm-blooded animals.

Flat, reddish-brown, wingless insects that hide during the day. Females lay eggs in protected crevices; infestations spread through transported belongings and furniture.

Bites can cause itchy welts and disturbed sleep, but bed bugs are not known to transmit disease. The photo is suggestive, but a clear close-up would be needed for reliable identification.