Spanish Noun: Dolencia
‘Dolencia’ comes from Spanish ‘dolor’ [pain] and it is used frequently instead of ‘enfermedad’ [sickness]. In case it comes across, you should find out whether or not a pain is involved.
Should pain be out of the picture, you must take it as ‘ sickness’, not as a suffering pain.
Esa dolencia tiene más de un mes con él
He has had that ailment for more than a month