My dad was diagnosed with bone cancer two weeks ago and went into hospital after coughing up black blood he was also told he has pneumonia.  They began treatment on him straight away and pneumonia seems to have cleared away but my dad refuses to have any treatment for the cancer, yesterday when I spoke with him he sounded like he was going to die and had lost all hope it was just awful.  I was afraid to call the hospital today thinking the worst may of happened,  but to my surprise he feels 100% better all his pain has gone away and he is so positive and talking about going home.  is this normal? will the pain come back? will it get worse?  Why is it that the treatment made him feel worse and as soon as it all stops he’s okay again ?