Hello Dr. Grief My daughter has had some type of allergic reaction recently.  She has a rash that started on her arm and has since spread over her body.  She went to the emergency room two nights in a row and the doctors have said that it could possibly be insects maybe dust mites or bed bugs. They treated her with antibiotics and a topical cream.  Her apartment manager called Terminix and they could not find anything.  What do you suggest we do?
HI, it can be due to some allergy or some systemic causes also, first get it examined by a dermatologist and then to rule out allergic reaction you should go for differential count and total count of white blood cells, platelets count, prothrombin time and closing time, D dimer estimation, immunoglobulin estimation to rule out any autoimmune pathology going inside the body, can go for complete panel allergen test to rule out allergic reaction, serum Egg should be estimated. Respiratory tract involvement should be ruled out, internal gastrointestinal tract bleeding should be ruled out, routine examination urine should be done, and you should go to a higher center for its diagnosis and should not be neglected. Take care.