Drosera is usually prescribed to treat a deep, violent, spasmodic cough, especially whooping cough. Associated symptoms may include restlessness, anxiety, retching, vomiting, cold sweats, and nosebleeds. There may also be a feeling that there is a feather or crumb in the larynx, which triggers coughing. The voice is often toneless, hoarse, and deep. There is some indication that Drosera may be helpful in treating behavioral problems, particularly in children. Drosera is best suited to children who are restless, anxious, peevish, and distrustful. Their emotions seem unbalanced, and they often have difficulty concentrating. Their anxiety may increase when they are alone, and can be associated with a fear of ghosts. Drosera may also be given for childhood growing pains, especially if they are accompanied by emotional imbalance. Symptoms may include stiff ankles and pains in the joints and bones, particularly affecting the hips and thighs. Sundew was taken in the 16th and 17th centuries for melancholia. In 1735 the Irish Herbal advised that it could be used to "eat away rotten sores." The plant was used by Asian physicians for skin eruptions and during the Middle Ages it was used to treat the plague. When eaten by sheep, the fresh plant causes a severe, spasmodic cough similar to that of whooping cough. This led to the homeopathic proving and its use as a cough remedy. Drosera is mainly a cough remedy, and it is used to treat violent coughs. The cough is worse after midnight and, in the acute stages, ends in gagging, vomiting, nosebleeds, and cold sweating followed by talkativeness. This remedy is also good for growing pains, with a tingling sensation in the leg bones, and bone pain that is better for stretching. Other symptoms helped by Drosera include: a hoarse, deep, and toneless voice; stiffness; and inflexible ankles. When ill, people who need this remedy are restless, obstinate, have difficulty concentrating, have a sense of persecution, and suspect they will be told bad news.