Watch it closely and: An itchy painful bug bite with a black center can be looked at by a primary care doctor or a dermatologist to see if it is infected and to decide on treatment. Sometimes, certain spider bites get a black center because the area of skin there is dead from the toxins. An "asymptomatic" bite can usually be treated with the typical otc creams, and oral Benadryl (diphenhydramine) or Claritin antihistamine.
Answered 9/24/2018
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