The review examines the impact of the COVID-19 pandemic on the prevalence, manifestation, as well as the possibility of preventing and treating behavioral (non-chemical) addictions. Particular attention is paid to various manifestations of Internet addiction (IA): gaming, gambling, cybersexual and food addiction (FA). During the pandemic, Internet use increased significantly, leading to an increase in IA, mainly due to gaming, which correlated with the level of psychosocial problems. The increase in gambling occurred mainly in individuals with addiction or risk groups, while in the population the frequency of gambling decreased or did not change. Immediately after the start of the COVID-19 pandemic, the number of requests to porn sites increased dramatically, suggesting an increase in cybersex addiction. However, longitudinal studies in adolescents show a slight decrease in the interest in pornography in boys, and an increase from an initially low level in girls. The proportion of eating disorders and FA significantly increased. An increase in FA was associated with depression, anxiety, and also in obese individuals. In the era of COVID-19 prevention practices and general remedial activity should take into account the needs of the general population, emphasizing the importance of self-regulating and balanced lifestyles with moderate and sensible Internet use during the pandemic.