Hard lumps under the skin of left arm without pain or itching may be caused by warts, lipoma, dermatofibroma and other diseases, which can be improved by general treatment and medication.
1. Warts: Warts may cause hard lumps under the skin of the left arm without pain or itching, patients should avoid rubbing and pressing the affected area. They can be removed by physical therapy such as laser and freezing. You can also use drugs such as imiquimod and 5-fluorouracil externally under doctor’s guidance, which can regulate the renewal of epidermal cells.
2. Lipoma: Due to the accumulation of mature fat cells in the subcutaneous tissue of the left arm, hard lumps can be formed, which are painless and itchy. Generally, no treatment is needed, and it can be surgically removed if there is any discomfort.
3. Dermatofibroma: due to the proliferation of subcutaneous fibrous tissue caused by various factors, forming a hard lump, painless and itchy. Generally no treatment is needed, and surgical excision can be performed if there is discomfort.
The causes of hard lumps under the skin of the left arm are many, and it is recommended that the patient should consult a doctor for examination, to clarify the cause of the disease, and cooperate with the doctor to carry out standardized treatment.