Yes I can relate, before November 2019, I was working locally in a well known budget hotel chain,
I was struggling to keep up with former colleagues,
second boss, at that time,asked why I was slower than my ex colleagues, couldn't understand why,
I explained how I was feeling, said you just need a week or so ,
that was start of my nightmare in regard of my health,
discover I had Rumertoid Athritis and recently diagnosed with OestoAthritis too,
interesting infor @Coyoacan mentioned about naturopathy healing your friend, who lives in different country,
As, in certain some countries, are more aware of , or emphasis put on what you eat,affects your health, ect,
It's interesting cause Rumertoid Athritis, is auto immune disorder, and I find certain foods I have eaten, will trigger inflammatory reaction and make me feel stiff and extremely achy,and either my leg give away, or I have extreme throbbing pain or dull achy sensation ,
this is common with suffers of Rumertoid athritis
Also I read a book on a retired nurse back in the 80s era , who suffered from Rumertoid Athritis,
she was told, she would end up in a wheelchair and not to get married have children, Cause this is your prognosis,
she looked into her diet, western diet, addressed this eat healthier,
she passed her training course,went on to get married had a largish family of 8 children too,
I picked up book from charity shop,as love getting a bargains from charity shops,
Also there is a world renowned Author ,Psychologyist, his name Gabor Mate,
who had God Awful childhood, experience experincined Holocaust ect,
he has wrote, a few or several books,
Called The body keeps The Score, The Myth of Normal ect,
The body keeps the score book is about having unresolved Traumatic events happen to you, Whithout having the essential support or not enough support is detrimental to our bodies, immune system, for e.g having extreme prolonged severe stress for so long, has over time, a toxic effect on ourselves,
a bit of stress to complete deadlines, is ok,as motivates to make a effort to do activities, that need to be done,
But if you experienced extreme bullying at workplace over time and had other shitty experiences too, add in the mix, this will create accumulation, a back log of trauma,
also having just one Traumatic experience unresolved can have adverse ,negative effect.
hence why having immune health disorders, can happen and western diet, the unhealthy aspects, can have obviously bad effect on our bodies and can effect our emotional well being,
Gabor Mate Psychologyist is on youtube,Internet, he does a interesting talks about this subject, ect