"Are flat, wart-like skin growths normal with age?"

Unfortunately, skin conditions (warts, rashes etc) can only be diagnosed if they are actually seen by a qualified health care professional. I can run through some possibilities and provide with a plan on how to go forward with these growths. There is such a thing as growths associated with old age. They are known as seborrheic keratosis. These are usually darker, wart like growths that can be raised and rather large. They are benign, have no cancerous potential, and not associated with any type of infection. Some of them resemble a scab from a healing wound. However, there are growths that can look similar to seborrheic keratosis that are not benign. For example, spots of melanoma can sometimes be mistaken for seborrheic keratosis to the untrained eye. I suggest you schedule an appointment with your primary care physician. He or she can take a look at them and decide if they are they aforementioned seborrheic keratosis or if they are possibly something else. Your doctor may then decide to refer you to a dermatologist for further consultation. Worrisome skin conditions such as skin cancer and melanoma do occur, so you want to make sure you have these things diagnosed and treated. Good luck.