Everyone experiences hair shedding, and it happens to each of us every day. Most people lose 50 to 100 hairs per day as part of this natural cycle, more on days you wash your hair.

The best thing you can do is talk to your doctor or dermatologist. They’ll get to the bottom of why you’re losing hair, and they’ll make sure you get the right treatment in case a medical condition is to blame.

Possible Causes Telogen effluvium. This type of hair loss can happen about three to six months after you go through something stressful.

Alopecia areata. This kind of hair loss often shows up as round bald patches. It can make you lose hair suddenly and seemingly out of the blue, according to NYU Langone Health.

Other medical problems. Yale professor of dermatology David J. Leffell, MD, writes that ailments including thyroid conditions and bowel diseases could be to blame.

Certain medications. Blood thinners or chemotherapy drugs could be the reason for your sudden hair loss.

Nutrition problems. These can include getting too little iron or too much vitamin A.

Don’t wait. The sooner you address the symptoms of hair loss, the more likely you are to prevent irreversible damage. Speak to a medical professional today to begin your journey to a fuller head of hair.