<s>[INST] Hello, I have a pea sized bump which feels to be attached to my skin internally, just superior to my elbow joint. My skin is slightly red at this location. It aches usually in the morning and evening and putting ice on it relieves the pain. History: About 5 years ago I believe I had an ulnar nerve entrapment caused by that joint. Had numbness in 5th and half of 4th finger/hand. No treatment...Took a year to be normal. [/INST] Hi Dear,Welcome to HCM.Understanding your concern. As per your query you have small bump on elbow joint. Well there can be many reasons for symptoms you mention in query like hives , meningococcemia , shingles , scabies , contact dermatitis , eczema or psoriasis . If condition doesn't get well then consult dermatologist for proper examination . Doctor may order blood test , skin patch test along with physical examination . Doctor may prescribe immunosuppressants , corticosteroid along with anti bacterial or anti viral depending upon the diagnosis . For now keep your arm  clean and dry , do not apply any cosmetic product and take antihistamine like benadryl twice a day . Protect your skin from direct sunlight and apply cold compresses on it . Hope your concern has been resolved.Get Well Soon.Best Wishes,Dr. Harry Maheshwari </s>