Thanks for contacting HCM with your medical questions. You are concerned about what could be biting you at night while you are sleeping. Over the past few years there has been a large infestation of bed bugs across the world. Bed bugs hide during the day and then wake at night to feed on people. The bed bugs are hiding in your mattress. The are red flat wingless insects that hide in the crevices of a mattress. They can live for weeks without feeding and they lay eggs in you mattress box springs and carpets. To fully eradicate bed bugs it is frequently required to have a professional exterminator. You can wash and then dry your clothes on the highest heat setting that your clothes can tolerate. Hope this answers your question. Please contact us again with your medical questions.