There are more differences between those with and without breasts, such as local appearance, symptoms, and lactation. 1. Difference in local appearance: People without paratits have smooth and flat armpits and underarms with no bulging lumps of tissue. Patients with paratesticular breasts will have bulging or swelling in the area, and if they belong to complete paratesticular breasts, they will have breast tissue and nipple, and the nipple is the size of a grain of rice; incomplete paratesticular breasts show that there is only one kind of breast tissue and nipple. 2. Symptom difference: People without paratits have no pain or discomfort in the armpits. Women with paratesticular breasts, due to the influence of hormone level changes, before menstruation, due to the rise of estrogen level, there will be paratesticular breast pain. 3. Difference between lactation and no lactation: people without paratits have no lactation here. For people with paratits, if they are pregnant or breastfeeding, the paratits may secrete milk. If you find the presence of paratits in your armpits, you should consult a doctor in time for a clear diagnosis and reasonable treatment under the doctor’s guidance.