I am taking methotrexate for an eye auto immune disease. This morning i noticed that my armpit was sore and i think there is a lump there. ( its very deep, maybe I am mistaking it for a muscle or tendon??). Is this something that is related to methotrexate and do i need to be concerned?
Hello! Thank you for the query. Methotexate can make immune system less active. This makes you more prone for some infection. Painful lump under the armpit can be caused by abscess formation due to hair follicle inflammation. It is more possible if you have been shaving this area recently. I suggest you to consult a surgeon with this issue. In case of doubts, ultrasound should be done and abscess incised. Hope this will help. Regards.