Do I have a disease and what is the name of it?

The more weight you gain the more problems you will have.Because of the weight gain there is a fluctuation with your hormones.Females who gain excessive weight will start to get these as well(they will even begin to grow hair in places they did not have it before).Losing hair and dry scalp can be caused by diabetes(it can also cause dry skin in places and dark,hard patchy spots).You really should see a doctor ASAP.