<s>[INST] Hi..I HV been experiencing a throbbing pain in left arm near where they draw blood for testing.it has a small place under skin about qtr size where hurts...it is severe at times.you cannot see lump and has been hurting the last couple wks..HV not injured it. [/INST] Hello, It is just a local inflammation. Nothing much to worry and it will settle by itself. As a first line management, you can take analgesics like Paracetamol or Aceclofenac for pain relief. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Shinas Hussain, General & Family Physician </s>