The polycystic ovary syndrome and thyroid diseases are among the most common hormonal dysfunctions. The mentioned conditions are able to affect the course of a regular menstrual cycle and impede proper preparation of the follicle and endometrium. In the result, instead of usual amount of blood, only slightly colored mucus is being discharged. Such a period might also have a shorter duration.
Scant menstrual discharge is also typical to an organism, which has been attenuated due to a stress, general diseases or an exhausting diet. In such cases, for the restoration of a normal endocrine profile, it is required to consult a doctor to develop a proper diet, with sufficient content of healthy ingredients, proteins and iron, as well as go through a medical therapy (including sedatives and vitamins), if necessary.
To recover the periods, which have become scant due to a trip, you should just go through the adjustment period and not worry.