Making a dermatological diagnosis requires a hands-on examination . Although I know you are "itching" for answer, a medical provider really has to see and touch these lesions, as well as take a careful medical history to make this important call. Trying to self-diagnose and self-treat isn't always successful, as you might imagine.
Head lice and body lice are two different animals, so it is unlikely that either one is your culprit. The term "itchy, red bumps" is really non-specific and can include hundreds, if not thousands, of clinical possibilities. The skin only has a limited number of ways it can response, and itching and create various rashes/bumps are just about all it can do. The possibilities are so numerous, that it would not be prudent to even guess, based solely on your description.
See a medical provider and get to the bottom of this annoying skin reaction.
Important: The opinions expressed in WebMD User-generated content areas like communities, reviews, ratings, blogs, or WebMD Answers are solely those of the User, who may or may not have medical or scientific training. These opinions do not represent the opinions of WebMD. User-generated content areas are not reviewed by a WebMD physician or any member of the WebMD editorial staff for accuracy, balance, objectivity, or any other reason except for compliance with our Terms and Conditions. Some of these opinions may contain information about treatments or uses of drug products that have not been approved by the U.S. Food and Drug Administration. WebMD does not endorse any specific product, service, or treatment. Do not consider WebMD User-generated content as medical advice. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare provider because of something you have read on WebMD. You should always speak with your doctor before you start, stop, or change any prescribed part of your care plan or treatment. WebMD understands that reading individual, real-life experiences can be a helpful resource, but it is never a substitute for professional medical advice, diagnosis, or treatment from a qualified health care provider. If you think you may have a medical emergency, call your doctor or dial 911 immediately.