See nothing wrong here...maybe brush more...

Namaskaram, We need to take good care of the child's baby teeth. They do eventually fall out but until then they play an important role in helping the child bite,chew food,speak clearly and also save space for the permanent teeth.Hence mainting a good oral hygiene from the very first tooth is important . Brushing with proper brushing technique and making this a fun activity so that the child gets motivated is the main goal . You can visit your dentist who can guide you more on oral hygiene instructions that can be followed . Team Shambhala.

Clean with cotton gauge,  proper brushing.  It will go. If not visit pedodontist

Don't panic. You just have to clean the rough surface. It will be normal in few days. Just maintain the hygiene. Brush her teeth, clean her tongue. Make sure you clean teeth with cloth or gauze after every meal.

Just take a clean cotton or cloth and rub the tooth, it is mostly a superficial layer due to not being able to brush. Also, please start brushing your kids teeth twice a day.

Hi please don't worry it doesn't look like something serious. Jst visit the nearest dentist or pedodontist they will guide u what to do next.