The below list is just a few of the many problems Hypnosis can help with. 

Bad Habits:
Smoking
Drugs and Alcohol
Eating Disorders
Nail Biting
Blushing
Thumb-sucking

Stress:
Anxiety
Hypertension
Panic attacks
Irritable Bowel Syndrome (IBS)
Gastric Problems
Tension headaches
Low energy levels
Low concentration levels

Sadness and unresolved grief:
Death of a close relative/friend/pet
Miscarriage
Divorce
Separation

Social difficulties:
Lack of Confidence
Lack of being assertive
Examination/Test/Interview nerves
Public Speaking
Stage fright
General difficulty in interacting
Phobias and Fears

And much more...