Is my donor area healing normally 18 days after Hair Transplant? (photo)

That's a large transplant.  It will take a few weeks to heal.  It appears that you may have also experienced some shock loss which is usually temporary.  Be sure to follow up with your doctor.

Hello,The donor area after FUE, whether by hand or ARTAS, takes some time to heal.  Most patients heal atraumatically over a period of weeks. As your hairs begin to grow, the donor area becomes harder to see.  Daily washes with mild soap can help keep the donor area clean. If scabs form, mild soap and water can be helpful. We use PRP in the donor area to facilitate healing as well.  
Best,
Anil Shah

3800 FUE leaves a big scar as you are noticing and will take time to heal. If your are losing chunks of tissue and not hair it may be grafts that did not take.

The donor area after a hair transplant will take several months before returning to normalEvery patient are not healing at the same speed.

At this early stage in the recovery process it appears fine bearing in mind such a huge number of Grafts have been extracted you do have a significant amount of healing to do both in the Donor and Recipient Areas. You may well have suffered with some Post Surgery Shock Loss - I think TIME is the key here, you need to wait for the Donor Area to heal and the existing hair to regrow and allow the new grafts to comes through circa 3 to 4 months post surgery at the earliest. I would advise a follow up with your Surgeon around this time and possibly 6 months post procedure as its such a big surgery.

At 18 days thongs appear to be healing normally. Keep in mind, It is much too early to judge how things looks currently. Early growth has just started at the 3 month mark. At 6 months you will be at only about 50% growth, at 12 months you will be at roughly 90% growth. Remain patient and continue to follow your doctors post op care instructions.

18 days is too early to see anything close to a final result.  If you have any other complications you need to see your doctor but the redness of the scalp may take a few weeks to completely resolve.  Individual differences might be seen between people in the process of their healing.  Discussing it with your doctor would be the best course of action if you are concerned at this point.

It appears to be healing however the area appears very thin. I wonder if you were over-harvested?  Ask your doctor. 

Unfortunately  FUE Is advertise by many doctors as being noninvasive with no down time which is not true. It usually ties about two to the weeks for healing process.

The photo you show represents a normal healing process. The donor area after an FUE procedure can take up to 3 months to fully heal. I would keep the area moisturized and the crusting should minimize in a few weeks. The white spot with the falling hairs in very consistent with a telogen hair. This is very normal and you did not loose that graft.