Although 308 is better for lighting now, not every hospital has 308. Most hospitals use only UVB, and when everyone uses UVB, There are also many points to note.
1. Narrow spectrum UVB usage
The instruction manual says to start with the smallest amount. Narrow UVB grades the amount of light. Some are divided according to 1,2,3…, and some are divided according to minutes. In conclusion, the higher the number, the greater the exposure.
The first time you use it, you must start with the smallest amount and work your way up; three times a week is enough. But
yes, here’s an important detail to point out: it’s definitely not always Increase the amount by one unit from the last time. Whether it increases or not depends entirely on the tolerance of your skin.
So how do you tell if your skin is receiving more light?
In general, after normal and effective irradiation, the skin feels “slightly itchy and slightly red after a few hours after irradiation” (note that both are “slightly” , instead of itchy and red).
When this feeling occurs, it indicates that the skin is able to tolerate the current amount and is responsive. Therefore, when using it for the second time, keep this amount and do not increase it. If the skin is still slightly itchy and a little red after irradiation this time, it means that it is still effective, and this amount should be adhered to for the third time.
If the skin does not react this time, that is, it is not itchy or red, then the amount is not enough; then one should be added for the third time Unit usage. Gradually increase the dosage, and when it reaches about 15-20 minutes, stop adding more. Because according to clinical doctors, this is the upper limit.
At this time, if you encounter some situations, the treatment is interrupted during use. For example, a business trip was interrupted for 2 weeks. At this point, when continuing treatment, moderate dose reductions are necessary.
Because stopping use for a period of time will cause the skin’s tolerance to decline, if the amount before the interruption is maintained, the skin may not be able to bear it. damaged.
Stops approximately once to go back 1 unit. Re-irradiation starts from the unit amount after the setback and increases gradually.
Here, I want to emphasize that we must overcome impetuousness. Don’t think: a larger amount is always better than a smaller amount. Wrong, when the skin can’t accept it, it will appear red, swollen and hazy. When the skin has such symptoms, melanin cannot be produced. If the skin is festering, for friends in the developing stage, where the rot is, the vitiligo will expand.
2. Medication use
narrow Do not use any topical medicines before, after or even on the day of UVB irradiation. Because the penetrating power of narrow-band UVB is very strong, it does not need any external medicine to enhance the effect.
Some friends said that using some psoriatic lipids, such as Minbaining, can not increase the photosensitivity effect? Wrong Well, that is for the sun or the broad wave uva.
Narrow-type should never be used, otherwise it will lead to excessive skin acceptance, redness and irritation. Don’t use any external medicines, and don’t use anything like Pupiter and Vitiligo.
Of course, internal medicine does not affect phototherapy and can be taken. If you have an epidermal transplant, the use of narrow-band will speed up the even production of melanin, and the effect is very good.
3. Distance
< span>The irradiation distance is not as close as possible. If you’re tempted to stick the device to your skin, you’re wrong again. Too much, too much light.
When I use large-scale phototherapy in the hospital, the distance is about 1/3 meter. I estimate it should be 1/4 meter in hand. Appropriate distance can prevent the skin from being exposed to excessive radiation.
4. Usage time
This is a long-term process, at least no less than 3 months. A large area with an annual meter. So everyone should overcome impatience.
5. Overprocessing
Here is an important note for everyone.
On the day of each exposure, do not wash exposed areas with water, especially warm water.
Because the narrow UVB can only penetrate very thin skin, because of its short wavelength, most of it stays in the epidermis. If it is washed with water, the waves that have not been absorbed will be washed away, affecting the effect.
This feature of the narrow wave, in turn, can be used as a strategy to deal with overexposure. In case of overdose, you can take a bath with warm water for more than 10 minutes, so that there will be no redness or flow.
If allergies occur without timely treatment, it is recommended to stop using phototherapy immediately. A plaster for inflamed skin. Wait until the skin returns to normal before continuing to use it.
6. Radiation protection technology
To prevent light damage to the skin and eyes. Since the narrow light is afraid of blocking, you can use some thick clothes to block it. Or use a thick black cloth as a shield to absorb light. Wear black UV-absorbing sunglasses for your eyes. Don’t think you’ll be fine if you close your eyes, it’s narrow and short, and you can get into it with a little slit.
If your white spots are concentrated, you can cut a hole in the shape of bb on a piece of black cloth, and let the light shine on the bb in the hole . If it’s very scattered, it can be troublesome; consider applying sunscreen on good skin to absorb UV rays and wait until the next day to wash off.
7. Side effects
< span>Generally speaking, narrow-band has no side effects and hardly causes cancer. If there is redness, swelling and allergy during use, most of the time it is also caused by poor dose control or the use of photosensitizers, which has nothing to do with the narrow method. So you can rest assured in this regard.