Very interesting read on the effect the moon cycle has on human behaviour and Hijama.
Hijamah and the lunar cycle:
In health it is generally recommended to perform Hijamah only on the 17th, 19th or 21st of the lunar month. These are the dates recommended in the Ahadeeth but there is no harm in doing it any time in the latter part of the lunar month from the 17th to the 27th, provided that the climate is suitable for it as detailed above.
The reason for this has to do with the effect of the moon on the blood. Just as the moon has an effect on the sea and produces high tides, in the same manner when the moon is full it brings forth impurities from the blood to the surface of the body and has other effects as well.
It is interesting to note that the term “lunatic” is derived from lunar and indicates the effect of the moon and such behaviour. In fact, lunacy is more likely at the time of the full moon since this is when there is a lot of liver energy which can give rise to easy anger, ﬂared tempers etc.
Many who suffer from conditions such as epilepsy, migraine headaches, high blood pressure etc note that their symptoms are worse during a full moon that at other times of the month.
Studies show that more assaults occur around the full moon. More crimes, self and unintentional poisonings and animal bites occur during the full moon cycle as well.
The moon also has an impact on fertility, menstruation, and birth rate. Melatonin levels which are inﬂuenced by the phase of the moon correlate with the menstrual cycle.
Admittance to hospitals and emergency units because of various causes also correlate with the moon phases. In addition, other events associated with human behavior, such as trafﬁc accidents, crimes, and suicides, are more common during the full moon phase as well.
Studies indicate that melatonin and endogenous steroid levels are affected by the phase of the moon and may be the means by which the physiological changes occur in response to the moon phase. The release of these neurohormones may be triggered by the electromagnetic radiation and/or the gravitational pull of the moon.
In a more recent study conducted in 2013 at the Psychiatric Hospital of the University of Basel, Switzerland, researchers found that around the time of full moon, sleep was affected with subjects experiencing decreased electroencephalogram (EEG) activity, taking longer to fall off to sleep, and also reporting decreased sleep quality. This also correlated with lower melatonin levels.
It is however not recommended to have
Hijamah during the full moon phase itself, as it is understood that the blood will ﬂow in excessive and unnecessary amounts, but afterwards (from the 17th onward) it is a means of removing the impurities and ‘heat’ from the body.
–The lunar cycle: effects on human and animal behavior and physiology.Zimecki M.Postepy Hig Med Dosw (Online). 2006;60:1-7. Review.
–Evidence that the lunar cycle inﬂuences human sleep.
Cajochen C, Altanay-Ekici S, Münch M, Frey S, Knoblauch V, Wirz-Justice A.Curr Biol. 2013 Aug 5;23(15):1485-8. doi: 10.1016/j.cub.2013.06.029. Epub 2013 Jul 25.