To decode this further, identified spider bites are less seen than assumed ones.Primary bite is one thing, and secondary infection is another.In cases like yours,assuming that you are sure that indeed it was an identified spider bite, the recurrence is more likely due to secondary infection than the bite poision perse.
Thus the assumed line of treatment would be based on a culture and sensitivity test and appropriate antibiotic therapy, should there be any pathogen.
Fungi can overgrow and might complicate the picture.Treatment should be simple and there should be no cause for concern.
Do consult your Doc.Cheers!
Recurring spider bite reactions are not mentioned in literature. infact it is the other way round!
Spider mythology across the world
Geoffrey K Isbister, Senior Registrar1
West J Med. 2001 August; 175(2): 86–87.
"Investigations should include wound swabs for microbiologic analysis, and for persistent necrotic lesions (over 3 to 4 weeks), a skin biopsy specimen should be sent for histopathologic assessment .
and appropriate microbiologic cultures (eg, fungal) In most cases, a correct diagnosis will allow the start of appropriate treatment".(Quote).
Best wishes.
I'm not sure, but I've seen programs on Discovery about vector animals. They mentioned some people who had been bitten by brown recluse years and years ago who were still having issues. I think you should get a referral to see a dermatologist who also knows about spider bites. So, not just any dermatologist. You may need to find someone who is also an immunologist or even an allergist who also specializes in vector insect and spider bites.