The newborn's head was hit by a phone and developed a bump.

If a newborn's head is hit by a mobile phone and develops a bump, it may be due to soft tissue swelling, subcutaneous hematoma, infection, or other causes. Treatment options include general care, medication, or surgery, depending on the specific situation. Details are as follows:

1. Soft Tissue Swelling

After a newborn's head is struck by a mobile phone, local soft tissue injury may occur, leading to swelling and pain. Within the first 48 hours, cold compresses can help reduce pain and swelling. After 48 hours, warm compresses may be applied to improve local blood circulation and promote healing of damaged tissues.

2. Subcutaneous Hematoma

If the impact causes rupture of small blood vessels under the skin, bleeding may occur and result in a subcutaneous hematoma. Initially, cold compresses should be used to constrict blood vessels and reduce fluid leakage. Later, warm compresses can help absorb the accumulated blood.

3. Infection

If the injured area is not properly treated and becomes infected, pus may form, resulting in an abscess. In such cases, incision and drainage may be required. Additionally, anti-inflammatory medications such as cefaclor granules, amoxicillin granules, or azithromycin granules should be taken as directed by a physician.

Besides the above conditions, the bump could also result from fractures, intracranial hemorrhage, or scar hyperplasia, which may require treatments such as laser therapy, cryotherapy, or surgical intervention. During treatment, proper local care should be maintained, keeping the area clean and dry to prevent worsening of the injury.