Hello,
Dark skin around the groin area indicates a skin disorder called acanthosis
It is usually a sign that person is dangerously
overweight and has
insulin resistance.
It typically occurs in individuals younger than age 40 and is associated with obesity and endocrinal disorders such as
hypothyroidism,
acromegaly, polycystic ovary disease, insulin-resistant diabetes, or Cushing's disease.
The basic cause is elevated insulin levels in blood.
Some medications like anti
cholesterol medications or systemic steroids can also result in dark pigmentation.
When seen in individuals older than age 40, this disorder is commonly associated with an internal malignancy, usually adenocarcinoma, and most commonly of the GI tract or uterus and less commonly of the lung, prostate, breast, or ovary. The stomach is the most common site.
You must consult a doctor and get thoroughly investigated to look for the cause and treatment.
Thanks