It is not recommended to go to a solarium before your MRI scan, which is a tanning bed that is more powerful than a normal one. The rays from the solarium can affect how clear the scan will be sometimes. It’s like taking a picture with a dirty lens – things might not turn out sharp. If you are worried about anything, you should avoid the solarium and speak to your doctor about any further concerns.

Hair fall is a common issue but it becomes a point of concern every day with the amount of hair shed as a result of stress, poor diet, or health problems. A balanced diet, stress management, and the treatment of underlying health issues are the best ways to take care of your health. The use of mild hair care products and avoiding high heat can also be beneficial.

Sometimes not having enough vitamin D3 can cause people to lose their hair. You should keep taking the vitamin D supplement as the doctor told you. You should try to eat more foods that have iron and protein in them as well. One thing that might help is finding ways to relax when you are stressed. 

It looks like you have bad case of ringworm which did not respond to the OTC medicines. I suggest that as soon as possible you see a dermatologist who specializes in fungal infections. They may give you oral antifungal medicine and topical treatment to improve the result. Seek urgent medical care since untreated ringworm can cause problems.