sudden itching all over body no rashsuddenly itchy all over no rashsudden itchy bumps all over bodysudden severe itching all over bodysudden itching in whole bodyitchy rash on back of neckrash over entire bodyitchy rash behind kneesitchy circular rash on stomachitchy skin no rash cancerred rash on thigh itchyfood allergy rash all over body