In addition to the idioms beginning with mend, also see on the mend.
See mend in WNW Idioms
on the mend
improving, esp. in health
on the mend
improving, esp. in health
See mend in American Heritage Dictionary 4 Idioms
on the mend
Improving, especially in health.
mend fences
To improve poor relations, especially in politics: “Whatever thoughts he may have entertained about mending some fences with [them] were banished”(Conor Cruise O'Brien).