From my book Collected Remedies:

Brown recluse bites.

Can be very dangerous. If you get a bite that swells like a boil, with a red center that quickly hardens over, DO NOT try to squeeze or press on the swollen area or pick at it - you will only end up spreading the poison.  For such bites, mix ground bromelain, colloidal silver, fresh garlic juice, apple cider vinegar and tea tree oil together into a paste and apply to bite area and surrounding area liberally.  Cover with a bandage and keep covered all day, changing as often as needed to keep the remedy on the area.  Also take 250 mg bromelain capsules two to three times per day, drink plenty of water, and eat plenty of raw garlic.  Continue all treatments until redness and swelling are gone. If swelling and redness continue to grow, seek medical attention.  Note: the author has had four brown recluse bites and has had far better results treating the last three naturally than he received from mainstream medicine the first time he was bitten.