Hi.. Thanks for the query.. Your symptoms of rashes along with itching and raised pustules seems to be most probably due to allergic reaction.. It can be related to certain food allergies, drug reaction, allergy to any soap or detergent or cosmetics, bed bugs etc.. I would suggest you to consult an Allergist and get evaluated and a thorough clinical evaluation and investigations like allergic tests like Patch test, RAST test, food challenge test etc can help in diagnosis and treatment can be done accordingly.. The tests will help in ruling out the exact cause of the allergen and once you know the cause of the allergic reaction you can avoid exposure to it to prevent allergy attack.. The allergist can advise to take oral anti allergics and a steroid shot for relief.. As of now you can take anti-allergics like Levocetrizine, Allegra to control the itching and swelling.. Do cool compresses.. Application of calamine lotion can help in soothing the skin.. Hope this helps.. Thanks and regards..