Background: I (66 year old male) have been a dog owner and/or dog-adjacent for the bulk of my life. I have had a dog for the last 3 years. I have no allergies to *anything*.
Situation: I adopted a rescue on 11/11, a Staffordshire mix (their guess). On 11/17 (six days later), I noticed a rash on my shoulders while showering. After my shower, I notice that the rash is all over my chest and back. By 11/18 the rash is essentially everywhere, but mostly on my torso, back and thighs, some on the face, hands and feet are relatively free. The rash doesn't really itch - it feels like dry-skin itch (that I get every winter). There have been no other new environmental/outside influences for weeks if not months.
I have *no* other symptoms.
My questions assuming this symptom is due to the new dog are:
How common is it for this to take six days to appear?
How common is it for the only symptom to be a rash?
Other questions:
What is the likelihood that the new dog *is* the cause of this symptom?
What is the best approach for determining the cause the rash?
Thank you!