Hello, Thanks for the query to H.C.M. FORUM. Skin rash may be due to , 1 allergic reaction as you stated that you are the only sufferers in the house , so chance of allergic reaction are more . Diagnosis can be confirmed by biopsy of effected parts and consultation with another dermatologist will help. 2 urticaria , however it is very difficult to evaluate diagnosis without exact physical examination of patient, hence for this rash physical examination is important . 3 Dermatitis is one more reason and dermatologist will find out the cause and reason , so get his opinion. 4 If dry itching is there think about pediculosis( louse born infection) You are right that scabies is a contagious disease. Good luck. DR. HET