There will be a few care and grooming elements to keep in mind during this time:
Since the coat will thinning so much, it will be more important now than ever to use quality shampoo and conditioner products
to keep both skin and coat moisturized and healthy.
Do not stop giving your dog baths during this time, thinking that this will help slow down the fur loss. It won't stop it and you want this phase to happen and then finish so that your Pom will have his luxurious new coat. So, continue to give your Pomeranian a bath once every 3 weeks.
Brush more now than ever. Do not worry about pulling out too much dead hair, you want that fur to come out and it will regardless. Removing some yourself helps prevent it from getting matted and tangled.
Using an appropriately sized slicker brush, carefully brush all areas of the body, reaching down into the coat. The goal is to pull out all shedded fur to make room for the nice, new coat. Brushing also helps to distribute body oils, remove debris and prevent tangles. You'll want to go gently, since the coat may be thin.
If your Pom develops any exceeding thinned areas, use a quality canine coat rescue lotion or cream for hot spots. Also, with any very thinned areas of fur, use some sunscreen if you will be taking your Pomeranian outside in the summer since those spots can burn easily.
Don't allow a puppy with the 'uglies' to lie down on the bare floor or carpeting since this can be abrasive to the skin due having much less fur. Encourage your Pom to lie on his doggie bed or place soft baby blankets on the floor in his favorite spots.
Poms with such thin coats will get chilled much more easily. If your Pom seems more sensitive to the temperature, slip a warm shirt or a cozy sweater or hoodie on him to help keep him warm.