Bit or stung by something, redness and very sore to the touch. has a dot in middle but dont see stinger or anything what could it be?

Try directly ap-: plying Soy Sauce to the sting for immediate pain relief. This usually works to take away the sting instantaneously .Thereafter ,watch out for secondary infection indicated by increasing inflammation,swelling,redness,drainage .If this occurs,you will need an antibiotic,so see a doctor.If you are allergic,the initial swelling will be pronounced ,and Benadryl (diphenhydramine) can help..but causes sedation.Be careful