Answers and questions on mammalogy
Hormonal diseases can cause asymmetry in the mammary glands - in very rare cases from early childhood. In this situation, you need a consultation by mammologist and, possibly, later by a plastic surgeon.
This “ball” in the breast could appear during breastfeeding, it’s called “galactocele”. In this situation, don’t worry too much. After the end of the lactation period, do ultrasound of mammary glands and contact a mammologist. It is difficult to assess the situation online.
Yes, these could be symptoms of mastitis. You can contact a surgeon with this problem. If the body temperature rises, then call an ambulance. In this situation, there is online consultation.
In this situation, you need to visit a neurologist and examine the thoracic spine. Such symptoms can occur in case of intercostal neuralgia, and cardiac pathology. You need to do ECG.