I am a 58 year old male, I weigh 150lbs.  I have a skin rash which is extremely itchy.  I have the rash on my arms, legs and trunk of my body mostly.  I also have it near my ankles.  I have been to the emergency room and also to a dermatologist.  I havnt been diagnosed.  They couldnt specifically say what I had.  The first time they thought it was poison ivory, the second time a reaction to a medicine.  I am taking cephalexin 500mg every 6 hours for 14 days.  A substitute for Keflex.  Also metronidazole 500mg every 8 hours for 14 days and cetirizine HCL 10 mg once a day.  I have been taking these medications for 1 week and no change.  Also Allergy relief tablets.  PLEASE HELP.
Welcome to Chat Doctor. Go for complete blood counts. There will be eosinophilic in allergic condition. Stop antibiotic in this condition. Fexofenedine 180 mg. (anti-allergic), local application of calamine will be helpful. Also rule out other condition like diabetes, worm infestation, thyroid .keep proper hygiene, Use medicated soap for bath. If it is recurrent then go for allergy test. Consult your dermatologist for medical management.