George Nissen, who was a tumbler and gymnast himself, took sports to a whole new height by putting them on canvas strung in a metal frame. Over years, canvas has been replaced by nylon weave, and frames are made lighter and more stable. And sport has evolved to incorporate elements of gymnastics, ballet, and even diving.

Trampolines first became available to public through entertainment venues where you paid for a ticket to bounce around for a specified time. Eventually, they found their way into schools, then gyms, then into organized associations as a real, and challenging competitive sport.

Answer : FROM symptoms that you have described, you may be suffering from dermatitis. Dermatitis is term used for an inflammation of skin. This condition is characterised by a rash and may be brought out by sensitivity to cosmetics, plants, cleaning materials, metal, wool and so on. Other forms of dermatitis can be caused by excessive heat or cold, friction or sensitivity to various medicines. Dermatitis is usually accompanied by itching at site of rash.

As it always happens before and during menstruation, it may also be caused by hormone imbalance triggering allergy. During menstruation, microflora in vagina also changes. This will increase risk of getting a yeast and bacteria infection, which will also cause skin allergy. To confirm cause, consult a doctor.