Hi, A lump on the forearm above the wrist can be caused by a variety of factors. It is difficult to provide a specific diagnosis without a physical examination or more information about the lump s characteristics, such as its texture, mobility, and whether it is hard or soft. The discoloration and tenderness you describe suggest that the lump may be due to an injury, infection, or inflammation. Numbness in the same hand may be a sign of nerve compression or damage. Given the size, tenderness, and discoloration of the lump, along with the accompanying symptoms of numbness, it would be best to seek medical attention promptly. You should consider visiting an urgent care clinic or scheduling an appointment with your primary care physician as soon as possible. The physician will be able to examine the lump, perform diagnostic tests if necessary, and determine the appropriate treatment plan. If the lump is infected or due to an injury, prompt medical attention can help prevent complications and promote a faster recovery. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician