As for medical treatment there are many treatments for psoriasis and each patient responds differently. Unfortunately it is often a case of trying various treatments until both your daughter and a dermatologist finds one that is effective in controlling your daughters condition. From what you say your daughters condition is at a severe stage and if this is the case she needs to be seen as a matter of urgency. If you cannot get prompt access (in this case almost immediate) to a consultant dermatologist through the normal manner of waiting for an appointment I would suggest the perfectly acceptable and often resorted to option of walking into a casualty department and seeking assistance as an emergency case. At the A&E dept you may not be able to see a skin specialist immediately but more than likely your appointment will be fast tracked and you may be lucky enough to see one the next day. Further to this do not be afraid to telephone your local hospital dermatology department and seek information on your daughters condition while informing them of the situation, this can be very helpful in many ways.
In conclusion: Unfortunately I cannot offer more than sympathy and my best wishes. I hope with all of my heart your daughter can get the condition under control and you as her obviously loving and caring mother get the help and support that you both require. As for treatment I strongly and without any reservation advise you listen to firstly your daughter and secondly a consultant dermatologist only, not quacks, faith healers, chiropractors, psychiatrists or psychologist wannabees, farmers, binmen, toilet cleaners, traffic wardens, nutritionists or blatant self serving con artists. This condition is something that can only be treated by a consultant dermatologist. When attending a consultant please don't be afraid to ask about possible side effects of any medicine prescribed and if you still have a concern use this site as a reference and a source of support.
There is only one other treatment that myself and I am sure others can readily recommend and I know from personal experience that it would bring your daughter enormous albeit non permanent relief is the dead sea medical center in Jordan. It is also accurate and true to say the German and Austrian health services send most of their Psoriasis patients for treatment there and have been doing in excess of 25 years. People from other countries attend privately or as small groups and I am in no doubt your daughter would both enjoy the experience and get tremendous relief from the condition. The mere fact that everyone else will have the same condition and not be covering it without showing any embarrassment can in itself be hugely beneficial. It is also worth noting that there are often young persons undergoing treatment there in the company of their parents so mingling mixing etc will never be an issue.
I know that personal circumstances etc may not possibly allow a trip to the dead sea center but if you wish to seek more information regarding this I will happily answer as best possible any questions you may have regarding this medical center and or treatment but I would steer you in the direction of the forum within this site regarding an upcoming organized trip as a group to the same clinic. I am sure Mattelie would be more than happy to forward you any information you may require.
I apologize for this long post but with honesty I have tears in my eyes responding to this as I know only too well how difficult it can be to come to terms with this condition and how much it impacts on the life of the sufferer and I can only imagine how difficult it is for both your daughter and yourself at this present time. Please use this site to support yourself and your daughter at this time as much or as little as you feel you need to but please remember there are many members here who have children with the condition and they can be a wonderful source of information and support but most of all please remember you are not alone and never a burden.
Best regards
William