I suffer from hemorrhoids a lot and a sore bottom,when i do,i use the ointment my GP has prescribed and also i use ice from the freezer on them,i have not had any infections in the rectal area or suffered from any other ones on a regular basis.I suppose the answer is not to strain,but its so difficult.I have had a thrombosis hemorrhoid on a few occassions,which is, i have been told, a large swollen lump full of blood on your bottom,its extremely painful!