Pain at the injection site after fertility or pregnancy-related injections can sometimes continue for days or even longer due to muscle irritation, local inflammation, nerve irritation, or swelling under the skin. Repeated injections in the same area may also increase soreness and tenderness. In some cases, a small lump, stiffness, or bruising can remain for some time even after taking pain medicines. Warm compresses over the painful area may help improve blood flow and gradually reduce muscle tightness. Gentle movement, avoiding pressure on the area, and proper rest may also help reduce discomfort. Pain may improve slowly if the irritation is muscular, but persistent pain should not be ignored, especially if it interferes with daily movement or sleep. Medicines for pain should only be taken as advised by your doctor because some medicines may not be suitable during or after pregnancy. Please consult your doctor soon if the area becomes red, swollen, or hot, develops pus, severe stiffness, numbness, fever, or worsening pain, as these may indicate an infection or deeper tissue irritation that requires proper examination.