A.M.
Hi C.,
I developed the same symptom after mowing the yard where deer frequently feed. It started as a red spot on my shoulder, but got bigger each day. After three or four days, I figured out what it was.
Your husband needs to take an antibiotic for at least 3 weeks. Know nothing about home remedies. It is best to stay as healthy as possible to minimize illness-diet/exercise etc.
The MD will give him the scoop. I never got sick, though the doctor did say some people may have a relapse even with the meds.
Now I cover up while doing lawn work. Not as comfortable, but I'm less likely to get ticks. I never saw mine. This can be serious if it is not treated. See the MD!
Good luck.
A.