If it's not a toothache he has, it is some sickness.
French: Si c'est pas mal aux dents qu'il a, c'est quelque maladie.
Comment:
This example has been taken from the Atlas linguistique d’Haïti (Fattier 1998, vol. 3, map 353, notice 20). M gen danfèmal/maltèt 'I have a toothache/headache' is also absolutely possible.