This eBook chapter provides a detailed account of the following health issues related to cell phone use: radiation, cancer, brain tumors, and sleep disorders. The chapter pays particular attention to the physical health effects of cell phone use, such as: how radiation can be absorbed into the human body, whether or not cancer is linked to excessive cell phone use, and whether cell phones can lead to the development of brain tumors. The findings presented in this chapter state that there are no solid links between excessive phone use and the harmful effects of radiation, the development of cancer or brain tumors, but insist on the need for further investigation. In this chapter the author lays out facts gathered from a variety of studies that have been clearly written and are easy to understand. Although most of the results appear to come from accredited institutes (Institute of Cancer Epidemiology), organizations (World Health Organization) and various researchers, it remains difficult to fully determine any errors due to the lack of available information on the author or the publisher. Although the information in this chapter on health issues is very intriguing and relevant to the topic, it is worth noting that most of the information comes from studies published between the years 2004-2006 and the results of these studies displayed are rather vague and lacking of details. More current specific studies have been published on these topics and deserve further investigation. The article focuses on a study investigating the connections between problematic cell phone use and the number of car accidents. The study focused on a 45-minute online assessment of...... middle of paper...... between cell phone use and worsening health problems. However, since questionnaires are not always totally reliable as research tools, it is advisable to be aware that this may represent a limitation. Works Cited Henke, J. (2012) Mobile Phone Devices: Development, Characteristics and Effects on Health and Society (pp .63-75). Retrieved from http://www.ebscohost.com/ebooksO'Connor, S.S., Whitehill, M.J., King, M.K., Kernic, A.M., Boyle, N.L., Bresnahan, W.B., Mack, D.C., Ebel, E.B., (2013). Compulsive cell phone use and history of motor vehicle accident. Journal of Adolescent Health, 53(4). 512-519. doi: 10.1016/j.jadohealth.2013.05.015Thomee, S., Harenstam, A., & Hagberg, M. (2011). Mobile phone use and stress, sleep disturbance, and depressive symptoms among young adults: A prospective cohort study. BMC Public Health, 11(66). doi:10.1186/1471-2458-11-66