The red and circular patches that have spread all over your body might be ringworm. This is a fungal infection that requires specific antifungal drugs like Terbinafine or Clotrimazole in many cases. The affected areas should be kept tidy and dry; loose clothes may also be worn.

When your skin feels itchy, turns red and sometimes swells up it's called itching eczema or dermatitis. This could happen if your skin is sensitive to things such as soap, fabrics even stress. To relieve the condition, consider mild bathing soaps, and gentle moisturizers as well as resist scratching at all costs. If this doesn’t work out then you should see a dermatologist who can prescribe some special creams

Experiencing painful cracked corners of mouth, a condition which is also known as angular stomatitis, might be intolerable. This kind of condition might be brought about by a number of reasons such as vitamin deficiency, yeast infection, or drooling. The main symptoms involve the appearances of redness, swelling, and sores at the corners of the mouth. Ways to get it healed include keeping the area dry, applying the lip balm, and eating a balanced diet that has fruits and vegetables high in vitamins. 

This hard mass might be a lipoma, which is usually harmless and consists of fat cells. These growths mainly develop under the skin and grow slowly over time. Although it is good that you have had a scan, sometimes further tests are necessary for conclusive results. However, if it is very painful or bothers you a lot, consider consulting with a surgeon who may recommend its removal.