Why do i get radiating pain/dull ache/nerve pain from my teeth when eating hot or cold, spicy food or even just being outside i have two crowns, one that always bothers me as its always sore and slightly inflammed. my dentist said i need to get my gums cu

Toothaches : Toothaches are a difficult problem and there can be many causes for them. Without having met you i can only guess as to what is going on, but i would consider asking your dentist for a referral to see an endodontist for a consultation. Endodontists specialize in the nerve of the teeth and from what you're describing it sounds as though your nerve is irritated, dying or is already dead. Sometimes after having dental work done (such as getting a crown placed) the nerve can be irritated and just needs time to relax and go back to normal. Sometimes though, the nerve can be permantently damaged to no fault of the dentist (it can just happen sometimes) and will need a root canal. If your gums are inflammed, then there's probably truth to what your dentist said about getting the gums cut back as the inflammation will usually not resolve itself and will only lead to more destruction in the mouth unless it's corrected by the minor surgery. Gum sensitivity typically won't lead to the nerve pain you're describing however, so this tooth might have more than one issue going on with it. Best of luck.

Gums or nerves: Could be gum pain or a tooth nerve gone bad. Only your dentist can tell you. You need an x-ray and a nerve test.

Dr Raff and another doctor agreed

Perio endo lesion: There could be two different things going on with your crown. Dull ache and radiating nerve pain indicates that the nerve in your tooth is diseases and you should be evaluated for root canal. It also sounds like your dentist is concerned about a gum, periodontal problem in this area also. Perio-endo lesions can occur together and need to be treated together.