Thanks for the query.
Scanty flow or spotting during periods is called hypomenorrhea
This can occur due to causes like:
imbalance as in poly cystic ovary disease, decreased body fat, dietary changes, stress and strain etc.
- Thyroid abnormalities
- Decreased hemoglobin
If there is any possibility of pregnancy
, rule out miscarriage
If the possibility of pregnancy is not there, you can just observe the flow.
Possibly by increasing the nutrition and maintaining ideal weight for height etc, your next cycles can become normal.
If the scanty flow repeats in future, better to consult gynecologist once and get evaluated.