Bacterial infections have been known to cause horizontal ridges in nails. Yeast or other fungal infections can lead to nail issues and one of those symptoms can be horizontal ridges. Other infections like heart valve infections and viral warts can also change the way your nail looks, including horizontal ridges.
The clinical syndrome has been characterized by restlessness, anorexia, irritability and insomnia that begin less than 24 hours after discontinuation of marijuana, peak in intensity on days 2 to 4, and last for seven to 10 days (Budney et al., 1999; Haney et al., 1999; Mendelson et al., 1984).
Related to Substance Abuse and Addiction. Heavy Pot Use Can Cause Physical Dependence. Nov. 27, 2000 -- Heavy marijuana users who stop cold turkey experience a host of withdrawal symptoms, including irritability, anxiety, and depression, but most symptoms begin to lessen after 10 days or so, a study from Harvard Medical School suggests.