How are babies affected by COVID-19? Babies under age 1 might be at higher risk of severe illness with COVID-19 than older children. The prevalence of gynecomastia peaks again between the ages of 50 and 69. In most cases, the swollen breast tissue will go away without treatment within six months to two years. Gynecomastia caused by hormone changes during puberty is relatively common. Other symptoms: breast lump, breast redness and nipple discharge. Breast symptoms in newborns are also covered. Any lump found under the areola is a breast bud until proven otherwise. What does a breast bud in a baby feel like?īreast buds are small, disc-shaped lumps felt under the nipple and areola.