Those are really clear signs that you have a bad diet. The spots are from too many fats and oils. The hair falling out shows that you don't have enough vitamins, minerals, and proteins. Make sure you get all of your nutrients and amino acids and get more of the basics, such as calcium and protein. In other words, improve your eating habits.
If this doesn't help, strengthen your scalp by switching to organic shampoo. Your hair will feel gross for a while because it is getting rid of the "plastic" pretty much coating you hair because normal shampoo coats your hair to make it look shinier. Organic shampoos help with scalp strength and hair health, but are more expensive.

I hope your problem is solved!