It's bad to keep important things secret from your parents.
John is a teenager with parents who has just noticed an abnormal lump on his body.
John wants to not worry about the lump.
John immediately seeks help and informs his parents about the abnormal lump he has found on his body.
Embarrassed, John decides to just ignore the lump and not tell his parents or anybody else about it.
John's parents take him to the doctor where the doctor treats and removes the lump on John's body, so he can go back to his normal life.
The lump turns out to be cancerous and spreads until it becomes a noticeable detriment to John's health.