treat (GIVE MEDICAL CARE)
verb [T]
to use drugs, exercises, etc. to cure a person of a disease or heal an injury:
He is being treated for a rare skin disease.
Western medicine tends to treat the symptoms and not the cause.

treatment
noun [C or U]

treat (DEAL WITH)
verb [T usually + adverb or preposition]
to behave towards someone or deal with something in a particular way:
My parents treated us all the same when we were kids.
He treated his wife very badly.
It's wrong to treat animals as if they had no feelings.
I treat remarks like that with the contempt that they deserve.

treatment
noun
1 [U] the way you deal with or behave towards someone or something:
Peter gets special treatment because he knows the boss.

 

From Cambridge Dictionary online