are a result of open skin pores on face. Its a common problem, but sadly pores cannot be closed.
For blackhead removal, best way is to remove them mechanically in a salon/beauty parlour. Then keep skin clean, by regular washing and scrubbing. Also avoiding steam during facial/clean up is helpful, as steam futher enlarges the pores.
Keeping body healthy by good diet, more fluids, keeping fit by exercise and minimizing stress
is good for whole body including skin & hair.