It looks like early carious lesion no need to worry

Hello, From the image, these appear more like deep pit stains in the grooves of the tooth rather than a large cavity. Many times, brushing cannot remove stains that settle inside natural grooves of molars. These areas are prone to discoloration even with good oral hygiene. However, to confirm whether it is only staining or an early cavity, a clinical check with probing (and sometimes an X-ray) is needed. If it is: • Only stain → simple cleaning or polishing will solve it. • Early cavity → small filling can prevent it from growing further. No need to panic, but don’t ignore it either. You may share a clearer close-up image or connect online for proper guidance. Take care.

Hello It is a very small cavity and with persistent maintainence of oral hygiene, it may get arrested on it own. Still if you feel it is increasing, you may visit the dentist and get a filling done Not to worry, cavity develops due to various reasons. Just maintain good hygiene and visit the dentist if it increases

From the image, the dark spot is in the groove of the tooth. Since it has been there for months with no change and no pain, it is most likely a deep fissure stain. If the area feels sticky, traps food, or causes sensitivity, it could be an early cavity. Brushing cannot remove deep groove stains. A dental check will confirm whether it needs only cleaning or a small filling.

Looks like small caries. It can be checked clinically to verify. 

Hello This looks like a small early cavity Please visit the dentist for the check up and filling if necessary

Hello These are superficial cavities. Maintain good oral hygiene so that it doesn't grow. If you want to get rid of it you will have to get it restored.