Hey friend. I used homeopathy from birth with my kiddos. I administer orally. If you can talk more about Marius' experience it can be easier to nail it down. Here's a slight rundown of some common remedies which is by no means complete but may help:
If he's irritable, fussy, with one cheek red and the other pale and in a lot of pain chamomilla is a good choice. These kids tend to have trouble around 10-12 pm, usually over by 2 am. They are also sweaty kids when they are in bed.
If he's whiny and clingy and just wants to be held pulsatilla may be a better choice.
If he's feverish, flushed and his gums are inflamed and red, belladonna. Calc phos is a great remedy for difficult dentition. I would think of it when teething was happening later, or if there was a lot of vomiting. It also has "feeble digestion."
Coffea cruda has wakefulness starting at 2 or 3 am and tossing and turning thereafter. These babies, like chamomilla are irritable and sensitive to pain.
There isn't a "teething" remedy but there are usuals for teething. So basically just see what seems to fit his overall picture. You may not see him in any of these descriptions either (though I'm thinking coffea!) and in that case just post back. You can also try a combo remedy-the only problem there is that it's a lactose base and I can't recall if ya'll have dairy issues.
We do have dairy issues, though I'm not sure if *he* does or just myself and DS1... Still haven't given a significant amount to DS2 to figure out if he does either, though it wouldn't surprise me. DH also has dairy issues so... I would put money on it being very likely.
So, I think I'll grab pulsatilla and coffea as a back-up in case the pulsatilla doesn't work. I'm so tired.
PB Thanks so much!