I have an itchy welt like rash on neck, eyes, elbows, pelvis and legs. Now developing bruise like soreness at the base of both palms.?

This is unusual. Leah, you really need to see a clinician both to get relief from the symptoms and find the cause. You can take over the counter antihistamines like Benadryl (diphenhydramine) for the itching, but the soreness is strange and could mean it is something more than just an allergy. Good luck!