"And being not weak in faith, he [Abraham] considered not his own body now dead, when he was about an hundred years old, neither yet the deadness of Sarah's womb.
Romans 4:19

Abraham never denied the problem;he just didn't consider it. God doesn't want us to deny that problems exists. That would be lying.

God wants us to consider His word and keep our eyes on the answer. He wants us to say what His word says and not what we look like or feel.

The word says that by Jesus' stripes we are healed. So we are to choose to believe His word and not consider how we look or feel.

Then soon our bodies will look and feel what the word says.