Thanks a lot for your replies.
His PP has been raising for more than 3 times, but everything else seems to be perfect, so the doctor didn't seem worried last time.
Today John was less concerned and said the pain could just be old age, just like you said Tom. The pain in his ribs isn't new, already when he was in the hospital he was told they were affected by the disease, but the hip/leg pain is new. Hopefully it is nothing serious.
Love
Amelie