Gynecomastia typically looks and feels like a button-sized growth underneath your nipple. You may be able to see this as a breast lump or feel it when you press on the area. The lump may move easily within the breast tissue and may be tender to touch. Breast lumps and enlargement may occur in one or both breasts.

It  is a condition in which the glandular tissue in the breasts becomes enlarged in males, sometimes causing discomfort or nipple tenderness. It is usually the result of a hormonal imbalance and typically occurs during infancy, adolescence, or mid to late life.