Sorry to hear about your problem. It is hard to know exactly why your arm has changed color and why you have the other symptoms that you are having, but it is important that you discuss this question with your doctor
. This is because of the potential for problems with healing. Obviously, there are some potentially dangerous things that could have bitten you, and what you describe is not a normal reaction. It is always helpful if you have some idea of what might have bitten you. Also, your doctor might have more or less concern about your injury
after knowing your medical history because of the potential that you might have for delayed healing, ie, some medical conditions predispose people to having problems with wounds, such as smoking, diabetes, etc. Your doctor may feel to be more aggressive with treatment in such a situation, especially because the extremities have relatively low blood flow to begin with, and blood flow is important to allow these things to heal properly. The best thing that you can do is to speak with your doctor about your problem and get the treatment you need. Please speak with your doctor.