Looking like allergic rash.Do u have any allergic tendency like getting cold ,sneezings etc from Dust,citrus fruits etc?Increasing in histamines will cause urticaria kind of rash..here its looking like that.With detailed h/o like Origin,onset,any other c/o u have,causative factors, etc,Homeo will do better help.Try to notice the factors what r causing these..like any dust exposure, Pollen,soap,food,,pets,weather etc.If u r sure with these spcfc factors,then u avoid those to b free from rash.