Transient pain on drinking water, hot or cold beverages is dental sensitivity, which can be caused due to cavities, wear of tooth surface, or exposed root due to gum recession, and many other factors. In most of the cases, correction of the cause and symptomatic treatment like fillings, application of desensitizing agent, will solve the issue. However; definite treatment will require clinical and radiographic examination of your teeth.

This type of pain may be because of 2reasons- 1. Abrasion of the tooth with faulty brushing technique . 2. Dental caries causing loss of enamel ( The hard protective 1st layer ) &exposure of dentinal tubules of dentin (2nd layer of tooth ) This can be confirmed by the clinical examination of the teeth & if required radiograph. After that treatment will be carried out

Hello dear, Hope I can lessen your discomfort It seems to either sensitivity or dental caries However , chances of caries are more in last tooth Because of increased vulnerability I suggest you to get an an x ray to see whether it can be restored or extraction is required

This is sensitivity caused , may be due to decay or gingival recession. The area you have mentioned show, it might be due to the decay( reversible pulpitis). It might be in second stage. Please visit Dentist , take IOPA xray and  go for direct or indirect pulp capping procedures or RCT whichever needed. Need not to be removed ( if wisdom tooth and in inaccessible area , then extraction might be required).

Hi, Tooth sensitivity could be due to a wide variety of reasons.The data you have provided is too sketchy to make a diagnosis.Only a through examination by a dentist with or without an xray will be able to give a clearer picture of what ails you.