<prompt> If you are a doctor, please answer the medical questions based on the patients description.I found a hard colorless kind of painful lump on my armit. It s pea sized and it kind of just appeared. I m sure it wasn t there a couple of hours ago. A tiny bit of pus came out, but no more. I checked today and I don t think it s filled with anything. What do you think it is?  <response>: Hi.it is best if you consult with a doctor, preferably a general surgeon, for medical and physical examination. Based from your description, it could be hi Chat Doctor. These lesions usually occur on the underarm, especially after shaving or plucking andor usage of deodorants with strong chemical contents. Hair follicles get infected. Inflammation and subsequent abscess formation occur. Medical proper antibiotic regimen and surgical excision or incision and 