...is the remedy for unwanted thoughts and mental arguments that intrude into the mind and stop us concentrating.
White Chestnut thoughts are often described as 'worrying' - but they are not necessarily anxious or fearful, more repetitive. They worry at us like a dog worries a bone. White Chestnut thoughts go nowhere. They circle round and round in the head like a looped recording.
The remedy helps us think straight. We can deal calmly and rationally with any underlying problems that might be causing the trouble.
Dr Bach's description
For those who cannot prevent thoughts, ideas, arguments which they do not desire from entering their minds. Usually at such times when the interest of the moment is not strong enough to keep the mind full. Thoughts which worry and will remain, or if for a time thrown out, will return. They seem to circle round and round and cause mental torture. The presence of such unpleasant thoughts drives out peace and interferes with being able to think only of the work or pleasure of the day.
- The Twelve Healers and Other Remedies
Quoted from http://www.bachcentre.com