
gesundheitlich
health-related
Relates to the health of a person or thing; concerning health.
Aus gesundheitlichen Gründen musste er seine Reise absagen.
For health-related reasons, he had to cancel his trip.
health-related
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health-related
Relates to the health of a person or thing; concerning health.
Aus gesundheitlichen Gründen musste er seine Reise absagen.
For health-related reasons, he had to cancel his trip.
The adjective 'gesundheitlich' (health-related) is derived from the noun 'die Gesundheit' (health) with the ending '-lich' (-ly/-al). This ending often forms adjectives from nouns and means 'in relation to' or 'of the kind of.'
Beruflicher Stress kann zu gesundheitlichen Problemen führen.
Work-related stress can lead to health-related problems.
'Gesundheitlich' (health-wise/in terms of health) is very often used as an adverb to describe a person's condition. It then often appears with verbs like 'gehen' (to be doing) or 'sein' (to be).
Mir geht es gesundheitlich wieder viel besser.
Health-wise, I'm doing much better again.
A very common phrase is 'aus gesundheitlichen Gründen' (for health-related reasons). Other typical combinations are 'gesundheitliche Probleme' (health problems), 'gesundheitliche Vorteile' (health benefits), or 'der gesundheitliche Zustand' (health condition).
Sie konnte aus gesundheitlichen Gründen nicht an der Feier teilnehmen.
She could not attend the celebration for health-related reasons.
medical
Both medizinisch and gesundheitlich can express a reason related to illness. Medizinisch is especially appropriate when a doctor's assessment or necessary treatment is involved. Gesundheitlich refers more generally to a person's state of health, even without a specific medical intervention.

Lena sagt die Reise aus gesundheitlichen Gründen ab, weil sie sich noch sehr schwach fühlt.
Lena cancels the trip for health reasons because she still feels very weak.
Lena sagt die Reise aus medizinischen Gründen ab, weil ihre Ärztin eine sofortige Behandlung empfiehlt.
Lena cancels the trip for medical reasons because her doctor recommends immediate treatment.