This is a good question. It is very important that you make an appointment with your primary care doctor
to discuss your symptoms and have a full history and physical. Depending on what your doctor discovers during your appointment, he or she may decide to take a small biopsy of one of the bumps or refer you to a dermatologist
. Red itchy bumps can be caused by many things, one of which is bites, like you mentioned. I agree that mosquitos are unlikely given the weather, however, spider bites can cause large red itchy bumps. Another possibility is an allergic reaction to something that your skin is being exposed to in those areas. Hives, or urticaria, are large red welts that usually come and go on different parts of your body and can be caused by allergies, exposure to cold, and sometimes stress. If the bump feels hot or you develop a fever
you need to make sure you do not have an abscess, a pocket of infection under the skin, that would need to be incised and drained. Again, it is very important to seek medical care as soon as possible to get a correct diagnosis and appropriate treatment.