Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns.
As per your complain it seems that you have been bitten by a poisonous spider and it has lead to a severe but localized
allergic reaction that is leading to dark red spots and rashes over your hands..
I would suggest you to take anti allergics like Levocetrizine or
Allegra for reducing the allergy symptoms..
You can continue applying
Cortisone ointment over the hands..
You can alsp do cool compresses over your hands or can dip them in cold water as it will help in reducing inflammation and redness..
You can also apply
calamine lotion..
In case if the symptoms does not resolve in a week consult an Allergist and he can advise you a curse of
steroids along with anti allergics as well as give an injection of steroids for faster relief..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.