The answer to 'why is my stink bug bites' is that stink bugs do not actually bite humans. Stink bugs use their proboscis (a long, thin mouthpart) to feed on plants, but they cannot penetrate human skin. The discomfort or irritation you may be experiencing is likely not from a stink bug bite, but rather from another cause such as an allergic reaction or skin irritation.
Stink bugs are nuisance pests that can invade homes, but they do not pose any direct health risks to people. If you are experiencing any concerning symptoms or irritation, it's best to consult with a medical professional to determine the cause and get appropriate treatment.