The first symptom of gynecomastia is the enlargement of the male breast.
Gynecomastia is the enlargement of the mammary gland rather than an increase in fat deposition. In its standard form it is symmetrical and of slightly hard composition. Although it usually occurs on both sides, it is not unusual to appear on one side (asymmetric or unilateral gynecomastia).
There may be local sensitivity but it is not the norm. The most important thing is to distinguish gynecomastia from breast cancer.
Breast cancer appears only on one side and numbers the 1% of all tumors in men (hence very rare).
Shady areas include shrinkage of the nipple, secretion from the
nipple and intense hardness beneath the nipple or armpit glands.