Are tonsil stones dangerous? is there any health risk associated with tonsil stones?

Not really: They commonly cause bad breath, and can reflect chronic tonsillitis. Removal of the tonsils will solve the problem, but isn't warranted unless the problems are severe. They can be removed manually, but they almost always recur.

Tonsil Stones: They are not dangerous and pose no health risk. They are completely benign but may give rise to bad breath and/or a foreign body sensation.