involuntary tears

Walking in the cold evenings, wearing proper winter attire and with hands in the pockets, the head, especially the face, is the only exposed part of the body. It's been windy of late here in the UK, and the cold wind in your face on these cold evening walks of mine every so often brings water down my eyes. Sometimes I wonder if these are tears from the inside. Tears that I try to withhold, but my subconscious cannot.