The following are the most important diseases or complications that may be contributed to by Internet addiction:
Eyes and eye appendages (H00-H59).
- Visual disturbances
Blood, hematopoietic organs – immune system (D50-D90)
- Immunodeficiency (immune deficiency).
Endocrine, nutritional, and metabolic diseases (E00-E90).
- Obesity (overweight)
Musculoskeletal system and connective tissue (M00-M99).
- Neck pain
- Back pain due to non-physiological back strain
Psyche – nervous system (F00-F99; G00-G99)
- Alcohol abuse (alcohol dependence)
- Depression
- Insomnia (sleep disorders)
- Carpal tunnel syndrome (KTS) – compression syndrome (bottleneck syndrome) of the median nerve in the region of the carpal canal.
- Loss of control
- Addictions, especially to medications (sleeping pills).
- Social withdrawal
Symptoms and abnormal clinical and laboratory findings not elsewhere classified (R00-R99).
- Headache
- Nervousness
- Irritability
- Pain
Further
- Limitation of the quality of life
- Neglect of personal care and personal hygiene.
- Loss of reality
- Lower grades in school
- Disruption of identity
- Neglect of other areas of life
Prognostic factors
- Abandonment of leisure activities and friends (special alarm sign).
- Particularly at risk are depressives and loners