To dream of a shaved head represents completely sacrificing the way you think. Major change to your regular habits or behavior. Giving up certain thoughts and behaviors, often negative personality traits. A shaved head is common when a person is changing their lifestyle.
Example: A woman dreamed of shaving her head. In waking life she was trying to be a vegetarian. The shaved head reflected her giving up her old non-vegan habits.
Example 2: A woman dreamed of having her head shaved and having the word "cancer" written on it. In waking life 3 weeks after the dream she was diagnosed with breast cancer. The dream may have been intuitive about the shock should experience in her near future about having to completely change he life to fight the disease.
Example 3: A woman dreamed of seeing someone shaving their head. In waking life she was considering leaving her cheating husband and divorcing him. The shaved head in the dream may have reflected her feelings about completely changing how she thought about her lifestyle from married to single.