Yes, I understood. There are a zillion ways to do that. One of them could be:
while read line
if [ $lines_to_skip -gt 0 ]
<set lines_to_skip if necessary>
Note that <this code> is not syntactically correct.
If you want to skip line without actually reading them, that is not possible in the loop AFAIK. You could use an external program for that, but is that really worth doing?