The bumps under the skin on the chest may be caused by common warts, molluscum contagiosum and lipoma, which are recommended to be removed by physical therapy or surgery. 1. Common warts: Common warts may cause bumps under the skin on the chest, and cryotherapy, laser treatment or surgical excision can help destroy the lesions. 2. Molluscum contagiosum: Molluscum contagiosum may cause bumps under the skin on the chest. Laser treatment helps to remove molluscum contagiosum by causing necrosis of the affected tissues through the photothermal effect, thus removing the tumor. If the soft fiber tumor is large, patients are advised to take surgery to remove it. 3. Lipoma: Lipoma may be the cause of lumps under the skin on the chest, and surgery is the most common treatment for lipoma. Surgery is a common treatment method for lipoma. There are many reasons that lead to the growth of lumps under the skin on the chest, and patients are recommended to go to regular hospitals for standardized diagnosis and treatment.