You could be having atopic dermatitis. This can start in infancy and can occur in an adult. In this condition the skin is usually dry and there can be follicular papules. However, pus formation is not a primary feature of this condition; it could be due to superimposed secondary infection. One tries to achieve maximum relief with as little medication as is possible. Further, one should try to find the precipitating and aggravating factors and then try to avoid them. One has to carry on with these measures till the active phase lasts. In short, one has to learn to live with it, with minimum medication possible. However, this disease is usually not very extensive in the adult phase. Another condition in which you can have itchy follicular papules over the body is infundibulo-folliculitis.