Constipated,dark stools.help?

may be you did not eat well and did not drink enough water too as you were sick so just eat well balanced diet contain enough fiber and plenty of water and as long as you are not feverish or vomiting so no infection just a constipation and the black colour is due to many reason the worest is blood and if so i think it is due to constipation few little wound occurred during the page of stool via intestine