Do sweat cause hairloss? Doctors!

Morning doctors!! Thanks for looking at this I have severe hair fall and itching due to my sweat from head. Its like in huge amount. Head become watery soon if even i stand under sun for 1 min. And after workout should i wash my sweat head or not? Its becoming thinner now if i wash . I don't have dandruff and wash my head regularly once i reach home because of the sweating. Its seems abnormal. What should i do now? For Example i work in a mnc company where there will be air conditioners inside so my hair become dry due to that cold weather and oily too. Once if i come out of room its sweating for me from head alone and heavy itching starts. Please help me to save my hair and also suggest me daily routine. I cant skip going to gym or my usual outing. Thanks in advance