Final answer:
Jane is showing symptoms that suggest she is abusing methamphetamine, a highly addictive and destructive stimulant.
Step-by-step explanation:
Jane's symptoms, including compulsive skin-picking resulting in sores, jitteriness, extreme thinness, dental problems, a high consumption of sugary substances, and carrying a glass pipe, are indicative of abuse of a psychoactive drug. These specific signs are strongly associated with the abuse of methamphetamine, a highly addictive stimulant that affects the central nervous system.
Methamphetamine use often results in extensive dental problems, known as 'meth mouth,' and weight loss due to decreased appetite. The compulsive behaviors like skin picking are also common. The glass pipe is a piece of paraphernalia often used to smoke methamphetamine.