advised to see oral surgeon
Hello and thanks for reply.
As per the history posted here it appears that there could be a small damage caused to your sinus
cavity while crown replacement.
Therefore in my view, it is better to get it examined by oral and maxillofacial surgeon once.
If the extent of damage is very small then it does not require any treatment otherwise suturing can be done.
Therefore please go for second opinion
,if your present dentist
do not agree to your complaints.
In rare cases it could be cold
symptoms too but it is best to get clinical examination done.
Please let me know for further doubts.