Basically dental Caries also known as tooth cavities which are bacterial infections that destroy the tooth structure. You can Visit a dentist and get your cavities filled About the white coating on your tongue maybe possibly a fungal infection known as candidiasis it’s better you get a oral check up done and start up with medications.
Hi Tania... pain or taklif dhire dhire shuru hogi jab keeda andar nerves tak pahunch jayega...
You can do homoeopathic treatment to stop it further... You can consult me through lybrate..
Till then start with
Heklalava 6X tds..
BDS, FICOI, Fellow of Academy of General Education (FAGE)
First visit a nearby dentist and have a check up so that he teaches you correct methods of brushing and other types of cleaning and maintaining your oral hygiene. If possible get the necessary treatment done before it get worsen.