Hello,
I have gone through your query and understand your concern.
As he have
Crohns disease, this may the cause for Erythema nodusum.
Please continue the Tylenol as prescribed by your treating physician.
Bed rest will help in relieving pain.
It can go away on its own in three to six weeks. After it's gone, it may leave only a temporary bruised appearance or a chronic indentation in the skin where the fatty layer has been injured.
Thus nothing to be concerned about this. But it may return at any time.
As you have already diagnosed him crohns disease, no more investigation needed. If he have symptoms like
abdominal pain,
diarrhoea or
constipation, he need treatment. Otherwise no treatment is needed.
Thus better continue Tylenol and review with your
pediatrician after 3 weeks.
This is enough and nothing to be more concerned about this.
Hope this helps.
Please write back for further queries.
Wishing you good health.