One symptom often triggers the other. Fortunately, abdominal bloating and nausea usually resolve themselves with time. Examples of conditions that cause abdominal bloating and nausea include: 1  acid reflux. 2  constipation. 3  gastroesophageal reflux disease (GERD). 4  gastrointestinal blockage. 5  gastroparesis. 6  giardiasis (an infection from an intestinal parasite).
Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction. It is initiated by hormonal signals from the brain to the gonads: the ovaries in a girl, the testes in a boy.
For young girls, menstruation is one of the milestones of puberty, marking the beginning of fertility. Girls often grow taller and slimmer, and develop rounder hips during this period. Their breasts develop, and hair begins to grow in the pubic area, on the legs, and under arms. Puberty begins for girl before boys, often causing them to appear older than their male counterparts during this timeframe.