Well guys, I guess this is the most Off-Topic post ever. But since a lot of you know a great deal about the Middle Ages, I've decided to come here for help.
I have an Youtube channel here in Brazil, to bring information about the middle ages to the people, as my country is filled up with misconceptions. I'm planning to do a video about medieval hygiene, but I'm lacking reliable written sources. Could anyone help me with this? I would really appreciate. Even if you don't know a written source, if you have some knowledge you want to share, I will make this topic part of the written sources in the video description :D
Thanks to everyone who took time to read this!

Might be some usable sources in this thread on the Historum board:

http://historum.com/european-history/128177-b...urope.html

Not really a subject I've worked on, so I don't have anything citable at my fingertips.

Matthew

Mikael Manøe Bjerregaard has made a short english resume of his article in 2008 about Danish bathhouses in the middle ages.
Source: https://tidsskrift.dk/kuml/article/view/24661?acceptCookies=1
Full Danish article: https://tidsskrift.dk/kuml/article/view/24661/21608

Might be interesting for you to learn, that sweat baths were much more common than tub baths and the bathhouses were frequented by all social classes together (even royalty).
The fear of syphilis diminished their widespread popularity, but it was probably mostly the growing negative attitude towards nudity in public, that caused them to become more and more rare, they we can still find some even up into the 18th century.

A likely sweat house had been identified from ~1st century BC in Slesvig (Rantrum), so it is probably a very long tradition.

Based on etymology you had apparently two types of bath in the viking ages and middle ages:
"Laug" is washing = wet baths -> (origin of Lørdag (Saturday) = washing day).
"Bad" is sweating baths in dry air with short intervals of steam introduced.

This one might have some amusing and useful facts: http://www.medievalists.net/2014/07/people-dr...ddle-ages/