I had FUE treatment in early Dec, but now loosing hair after one month? (photo)

Each person and each doctor may have different opinions and or needs.  There is no right answer to your question.  Transplanted hair follicles usually shed before new hairs start to grow.

This is not uncommon.  There is some shedding to be expected after transplantation, and while the vast majority of patients it happens at around one month - for some it happens a little sooner, and for some it happens a little later.  Rest assured that there is good blood supply and follicular viability as the hairs stuck around a little longer than usual.  Remember, it can take 6-9 months for you to have some hair that you can style, and a full year to get your final results.  Don't worry too much about it at this point - the procedure is over.  Now comes the most mentally fatiguing part - waiting! You will do great.  Congratulations on your procedure! 

All of your transplanted hair should fall out within one month. If your natural hair is falling out, this is consistent with shock loss and it should grow back within 3-6 months. Please consult your doctor.

Transplanted graft’s hair starts to shedding in the first week of surgery and may go on untill 4-6 th weeks after surgery. İt is not surprising to lost approx.  %70-80 of all transplanted hair shafts in first month when you are washing, gently rubbing  or touching the head.New hair at transplant/recipient area starts to grow at 3-4 th month after surgery .

Shedding of the transplanted hair is perfectly normal after a hair transplant procedure and will occur anywhere from weeks 2 to 6 post op. Continue to follow your doctors post op care instructions and happy growing!

What you describing sounds normal.  Most of the grafts shed after the transplant and go into a resting phase.  The new hair begins to grown about 3-4 months later.  It takes nearly a full year to achieve the outcome for the procedure.

It is not uncommon to experience temporary shedding in the recipient area, or post procedure telogen, within 3-5 weeks after a procedure.  It occurs less commonly in the donor area.  Because the hair cycle is 3 months, you can expect to begin to see regrowth of your native hair, and growth of the transplanted hair at that time.  Treatments that may hasten the process include minoxidil and low level laser light therapy.

If you are Losing native hair after a hair transplant, then you should be on the drug finasteride which can prevent this from happening, See video attached