Head is a symbol of thought, clear thinking and reason. Oftentimes if a head in the dream appears normal it signifies that your thinking will be unaffected and clear. If something is wrong with the head appearance however it signifies that you might not be able to come to rational decisions in the upcoming time.
If in your dream you see your head being much bigger than normal it signifies that you will achieve success by using your good intellectual faculties. It can be said that you will indeed outthink your competition in your chosen professional field.
If in the dream you see your head being much smaller than normal it can signify that you should avoid making decisions in haste as this will not bring your success, especially in longer terms.
Seeing your head with an obvious injury on it (a cut or a bump) means that you should be more careful of your emotions getting in the way of your decision making process. You might also want to keep your personal life separate from the professional life and the happenings in your career.
If you see your head in a dream bleeding it means that you will be given advices by people who will be inexperienced or capable of giving worthy advice to you. Your work might also take unjust critique.
Dreaming of your head being bald or shaven in the dream is not positive as it signifies that soon you might have to face with a loss of your authority. This is especially true if your mood was negative during the dream, as is you were ashamed of your bald head.
If in the dream you see yourself having the head of your younger self, such having a child like head, it signifies that a past experience will prove very useful to you in solving a contemporary issue.