Lump in right thigh. Exist till date.

A small lump about 1 cm , red colored , inflamed without pain found in inner thigh around 1 month ago , it minimized and came again after a month with same size as before ,as noticed both times i was suffering from mild fever , and i always feel like weakness and fever. past history- from last 1 yr or so i was suffering from ankle pain in right leg, multiple blood tests and MRI of both ankle and spine done. nothing has been found. tried many doctors, also had physiotherapy treatment ,no one is able to identify ,pain has increased from ankle to upper calf and thighs but could not do anything , one of doctor also applied some injections directly in ankle , may be cortisone something which result adversely, i had no option left .so i left it around 2 months and started doing my normal work with pain, i am a patient of sinus and sometime feels breathlessness. just thought of writing , is all these related to each other or everything is just normal because all symptoms exist till date.