It may be harboring a hematoma. That is unlikely for such a youngster, but if he is, than you need to take him in and have it drained and hopefully repaired. There is a way they can do it. But not all vets know how, and well, they are more concerned with the ear itself, that the hematoma does not come back. When the cut it, they stitch it, and rarely will it stand up again.
A hematoma in the ear is a cigar shaped pocket of blood, which will break the cartilage, and if just let to heal like that will give you a crumpled-look to the ear, very much like what you have. I have a dog with one like that. The vet said we could just do steroids etc, but it will crumple. The other ear had been surgically cut and sewed, and it stayed broken. So I tried just the steroids, and the other ear, while broken is cleaner. Someone here though has had success with a different type of surgical procedure for hematomas.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC