Yes Homeopathy can help the child completely. Many times tics disorders are related with adhd or other behavioural disorders , which also is curable by homoeopathy. Time duration is difficult to say in homoeopathic course but can be judged after taking and studying the whole case of patient. Consultant Homoeopathic physician can treat this very well.
Next Steps
Consult a Consultant Homoeopathic physician who takes proper case of the child.
Health Tips
Have faith and patience with Homoeopathy. It will be more than useful to the child.