<s>[INST] hi , i have a lump under my armpit thats been there for about 3 months without bothering me but the last 2 weeks its been hurting and now its hurting and its a string pulling from inside skin down to my wrist. i wen to doctor and they gave me cephalexin but now the string is noticeable. looks like a vain and hurt really bad. can you share some ideas of what it might be because im worried. [/INST] Hi, Dear , Thanks for the query to My Chat Doctor clinic. I studied your query and understood your concerns. In my opinion-you suffer from-Thrombophlebitis or lymphangitis secondary to Lump in the armpit-which is mostly Chroni-boil in the armpit with infective origin. Treatment-a-Tb NSAIDs x 5 daysb-Antibiotics-to continuec-Tb Serropeptidase-to reduce inflammatory reaction to infective cause.d-Cold compresses with ice packs. This would take care of the acute stage of the Thrombophlebitis -caused by the inflicting infective inflammation around the boil in the armpit.e-Excision of the chronic boil - would resolve you from armpit lump. Hope this would resolve the issue and would help you to plan treatment. Wellcome for further queries in this regard. Good Night. </s>