You can buy some topical corticosteroids "over-the-counter" without a prescription. For example, for dermatitis, you can buy the steroid cream called hydrocortisone 1% from your pharmacy. Do not apply this to your face unless your doctor has told you to do so. This is because it may trigger a skin condition affecting the face ( acne or rosacea. ) Long-term use may also damage the skin. On your face this would be more noticeable than the rest of your body. So usually only weak steroids are used on the face. Those which are suitable are prescription-only.
Dermatological vascular laser (single wavelength) or intense pulsed light (broad spectrum) machines offer one of the treatments for rosacea, in particular the erythema (redness) of the skin.  They use light to penetrate the epidermis to target the capillaries in the dermis layer of the skin. The light is absorbed by oxy hemoglobin , which heats up, causing the capillary walls to heat up to 70 °C (158 °F), damaging them, and causing them to be absorbed by the body's natural defense mechanism. With a sufficient number of treatments, this method may even eliminate the redness altogether, though additional periodic treatments will likely be necessary to remove newly formed capillaries. 
Rosacea is a skin condition that affects parts of your face. Symptoms can include facial flushing, facial redness, spots, thickening of your skin, and eye problems such as dry eyes and sore eyelids. Not all symptoms occur in all cases. Rosacea affects about 1 in 10 people in the UK, usually in middle age. Many cases are mild. Spots can usually be cleared with antibiotic treatment. Other treatments may be used for other symptoms. A complication that affects the front of the eye (the cornea) is uncommon but serious. See a doctor urgently if you develop any eye pain or visual problems.