I'd suggest to try focusing on the nostrils as a gateway, and failing that, find a different meditation method for which your ailments will be less of an obstruction.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)