The sufferings that the Lord allows in our life are given to us for His good purpose.  Whenever God allows suffering to remain, He gives grace to endure it.

From 2 Corinthians 12:7-9:  “Therefore, to keep me from being too elated, a thorn was given me in the flesh, a messenger of Satan to torment me, to keep me from being too elated.  Three times I appealed to the Lord about this, that it would leave me, but he said to me, ‘My grace is sufficient for you, for power is made perfect in weakness.'”