Yes, it is normal to experience breast pain during the fourth month of pregnancy. This is due to hormonal changes and increased blood flow to the breasts. To ease the pain, you can try wearing a supportive bra, applying warm compresses, taking over-the-counter pain relievers (after consulting with your healthcare provider), and practicing gentle exercises or stretches. It is important to maintain good posture and avoid activities that may exacerbate the pain. If the pain becomes severe or persists for an extended period, it is advisable to consult your healthcare provider for further evaluation and guidance.