Mountain cedar, also known by its Latin name Juniperus ashei, is a drought tolerant native evergreen tree that causes winter/spring allergen in Texas. Although it is common in Mexico, in the USA, it is primarily found in Texas. The name Mountain Cedar originated from its highest density in the Hill Country area. Its name is somewhat of a misnomer since it is a juniper and not cedar and Central Texas is hardly mountainous. Most of the country is frozen in the winter without blooming plants, which gives people a break from allergies. Texas is unique in that it has a wintertime allergen, mountain cedar, which explodes in the cold winter months. Juniperus ashei is related to Juniperus virginiana that pollinates in the spring. Therefore, January till March is the peak season. The plant's part that causes allergies is the pollen, which is part of the plant's reproductive cycle. Did you know that trees can be male and female? The male cedar trees become covered with small brown cones that burst open on dry, windy days to release pollen. The pollen is often seen blowing in large clouds in the Central Texas area in January, often mistaken for wildfire due to the large and intense pollen clouds. The winds will carry the pollen for many miles, well into Oklahoma. Mountain Cedar is often referred to as “cedar fever” by the locals. Although ironic, cedar fever does not produce a fever. Instead, it causes our wintertime misery of sneezing, runny nose, sore throat, itchy watery eyes, asthma, and cough. Sadly, each winter, I hear many people say that they assumed that living in Texas means you suffer from allergies, and little can be done about it. No one should suffer from allergies with our excellent treatment options. First, over the counter antihistamines and nasal steroid sprays, and nasal irrigation are an excellent start. Second, prescription antihistamine nasal sprays can be added. If this treatment fails, immunotherapy by injections or drops is excellent. Immunotherapy prevents symptoms and is the only treatment option that can be curative in many patients. Dr. James Holman...