I do weight lifting and my arms are increasing in height but not in width. My inner portion of arms around elbow are too bony just like in the image. I do train the outer portion of the arm (brachiallis),however i do not know how to gain muscles on that inner portion, i still feel skinny

I do weight lifting and my arms are increasing in height but not in width. My inner portion of arms around elbow are too bony just like in the image. I do train the outer portion of the arm (brachiallis),however i do not know how to gain muscles on that inner portion, i still feel skinny submitted by /u/Whenallislost9
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