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. Your doctor may need to take a biopsy or refer you to a dermatologist
. There are many possibilities for what could be causing your rash. The first is urticaria, more commonly known as hives. These are most often caused by an allergic reaction to something you have been exposed to, such as a new food or lotion. However, they can also be caused by other things such as stress and the cold. It is possible that you are suffering from dry skin or eczema
. Another possibility is scabies, which are little mites that crawl under your skin. This usually causes an intense itch. As there are many causes for rashes and it is very difficult to diagnose you without examining you, it is important that you seek care with your doctor as soon as possible to get a correct diagnosis and treatment. In the meantime, try not to scratch or pick at your skin as this can lead to infection and/or scarring. Also keep your skin well moisturized by taking quick lukewarm showers and using a good quality lotion.