homeopathic remedies

Tory • Experienced first time mum (an oxymoron, I know 😁). But what can I say? I'm also interesting person. :)
My 5mo baby has the flu. 😔. He's on medication and all but my MIL just left and she was telling me about the evils of Tylenol for reducing his temperature, that I should just run some lavender oil on the soles of his feet and his forehead. I did that ( and also gave him Tylenol on the sly!), but have any of you heard of this? 
I'm curious, what home remedies do you swear by?