Can we Apply Alcohol on navel as in medical purpose is it Allowed ?and do the body of the person will get najis?

According to the Ayatullah Sistani (h.a) All Alcoholic liquors and beverages which intoxicate a person, are najis and on the basis of recommended precaution everything which is originally liquid and intoxicates a person is Najis.
But all kinds of industrial alcohol used for painting doors, windows, tables, chairs etc. are Pak. ( Mas’ala no 112 & 113)
As long as its medical purpose you may apply but if its non industrial alcohol then it would make the area najis where it has been applied.