A believer does not undergo (the trouble) of running a thorn or more than that when Allah effaces his sins. (Using translation from Muslim 2572c)
قَالَ رَسُولُ اللهِ ﷺ «مَا يُصِيبُ الْمُؤْمِنَ مِنْ شَوْكَةٍ فَمَا فَوْقَهَا إِلَّا قَصَّ اللهُ عَنْهُ بِهَا خَطِيئَتَهُ»