Thanks for your question on Health Care Magic. I can understand your concern. Insect bites are possible in your case. These can cause infection, inflammation, cellulitis and abscess formation in breast tissue. All these cause severe pain in involved breast. So better to consult doctor and get done local breast examination and ultrasound examination of breast. If ultrasound is normal then no need to worry for breast diseases. Musculoskeletal pain can also cause similar symptoms. So avoid heavyweight lifting and strenuous exercise. Avoid movements causing pain. Avoid bad postures in sleep. Apply warm water pad on affected areas. Take painkiller and muscle relaxant drugs. Don t worry, you will be alright, but first rule out breast diseases by ultrasound examination. Hope I have solved your query. Wish you good health. Thanks.