It looks like an abscess or carbuncle. Apply warm compresses and keep the area clean. Drainage is done only when it becomes soft and forms a head. Take some over the counter pain reliever and consult a doctor for examination and antibiotics prescription. Till that time, you can apply Mupirocin or Neosporin on the sore. Also wear cotton clothes and use a mild soap like Dove.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Thank you very much. Your diagnosis is correct. I went to the ER because the diagnosis and treatment by my doctor after a cursory examination no closer than three feet away made it worse. After my visit to the ER , taking the perscription, keeping the abscess clean and dry, it is healing nicely.