Sun damage, environmental toxins and tobacco smoke all contribute to wrinkles, DernNet NZ reports. Forehead wrinkles, also known as worry lines, are classified as dynamic wrinkles, meaning they develop from the action of facial muscles, the website states. The frontalis muscle contracts to raise the eyebrows. Over time, the forehead develops wrinkles. One way to help smooth forehead wrinkles is to use castor oil.
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Castor oil comes from castor beans, which actually aren't beans at all, but the seeds of Ricinus communis, an evergreen tree native to Africa. The oil is odorless and clear to light yellow in color. Its thick consistency allows you to use only a small amount of the oil to smooth over forehead wrinkles. The thick oil holds in skin moisture and smooths the skin. It's also used for under-eye and neck wrinkles.
Castor oil offers a natural and inexpensive option as a moisturizer and wrinkle cream for the forehead. Many people feel self-conscious about forehead wrinkles because of the association with aging and the way that wrinkles affect the appearance.
As skin ages, it becomes thinner, drier and loses its elasticity, the American Academy of Dermatology website explains. Skin gives in to gravity, causing sagging on the face. Sun damage, including differences in skin texture and discolorations, show up more after age 40. These factors make forehead wrinkles more pronounced over time.
Applying castor oil after washing the face, with the face patted dry so that the forehead stays damp, retains moisture in the skin. Using castor oil regularly prevents dryness and winter chapping, giving the skin a more youthful appearance. Keeping the skin moisturized with castor oil makes the forehead skin smoother due to the plumping effect of the moisture so that wrinkles appear less pronounced.
Because castor oil is odorless, it can be worn during the day. It provides a moisturizing option for people sensitive to fragrances, chemicals, dyes and other additives found in commercial skin products.
Castor oil absorbs well into the skin. Applying it at night after washing your face allows it to soak in overnight. Use warm -- not hot -- water and a soap-free cleanser on your face, DermNet NZ advises.
Applying castor oil sparingly in a light tapping motion with your fingertips stimulates the skin and circulation. Rubbing or pulling the skin when you apply castor oil or sunscreen can stretch the skin and increase wrinkling. Applying excess oil could block your pores and contribute to blemishes.
Rub a nickle-sized dab of castor oil on your forearm and leave it on for 24 hours before applying the oil to your forehead. Look at the oiled skin in bright light to check for a reaction. Don't use castor oil on your skin if skin irritation occurs.
A component of castor beans, ricin, is toxic. Castor oil doesn't contain ricin because ricin is water-soluble, according to the Cornell University website. Keep castor oil labeled and out of reach of children. Store it in a separate location from food products. Castor oil taken internally can cause violent diarrhea.
Too much emphasis on appearance can cause unhappiness. The happier you look, the less important a few wrinkles are to your looks, Alexa Fleckenstein, M.D. advises in her book, "Own Your Health: Healthy to 100."