About a week ago I notice red pimple like bumps all over my chest, waist line, shoulder and neck. The itching is mild and some of them are scaly red cir?

Skin. If you started a new medication this could be a reaction. If so contact you doctor about the condition. If not you should drop a dermatologist so they can have a look before you start treating. Treatment would typically involve an ointment with steroid once a diagnosis can be made. In the short term there are several over the counter treatments for itching like cortisone.