<s>[INST] Hi , I had a electric shock feeling going through my upper side tooth about a week ago very painful it lasted about 4 days but no pain at all in the day just in the evening it starts at around 9 o'clock it just comes on and now it's started again I can eat and drink fine all the through the day [/INST] Hi,Thanks for asking the query,Get a thorough clinical examination done.Take a IOPA radiograph.Root canal treatment has to be performed.Take a course of antibiotics and analgesics.Take care! </s>