The reason for tooth ache is the deep cavity.
Irritability in front tooth may be due to abrasion or erosion which can be confirmed after clinical examination or might also be referred pain from back decayed teeth.
You have four deep decays. Root canal treatment can be planned based on severity. You can start with the upper right.
Undergo cap placement compulsorily after root canal treatment.
You also require a round of scaling.
There is bone loss in a few regions.... Scaling should help
Next Steps
visit a dentist. get the root canal done as soon as possible.
Health Tips
donot delay
donot self medicate