valetudinarian (n.)
"one who is constantly concerned with his own ailments," 1703, from valetudinary (1580s), from Latin valetudinarius, from valetudo "state of health" (either good or bad), from valere "be strong" (see valiant) + -tudo, abstract noun suffix (see -tude). Valetudinary (adj.) "sickly" is recorded from 1580s.