You need to do investigation.

 On my 72 ,y.old am endured a COVID-19 , on begun  are legs hurt, knees, used injections ,  pills, but second month feeling weakness and sweating , till this am never sweated, wondered for peoples how they are sweating, weight is norm. What I  have to   do?

Infection caused of COVID-19 is having with post COVID-19 syndrome answers doctor Mashevich. And his symptoms are high tiredness, ache muscles, joints, headaches, dizziness, hear bad, weakness and sweating, smell lost and taste. And same displays are side effects of vegetative nerve system of organism on endured infection.

But post COVID-19 syndrome is a not only one for reason a high sweating, and before to use supplements and vitamin complexes, you need to consult with a doctor.And  to begin check thyroid gland, if she's producing much hormone ,thus hyperthyreosis displaying, as this condition having with high sweating, often heart beating, high sweating, stool disordering, nervousness, irritability , and to make sure,  that all is ok, visit endocrinologist and check these hormones.

Sugar diabetes for second type having with sweating, where pancreas gland is producing not enough insulin for sugar splitting is glucose. Other diabetes symptoms are fast weight loosing, tiredness, thirst, often urination, thus for know this, visit endocrinologist and on an empty stomach do blood test for check glucose level. And not forget about oncology  diseases , tumours are too insidious and displaying with non-specific symptoms are sweating, weakness, thinning.

 And if b relative line cancer had, thus you need to take attention, and cancer kinds a lots, but analyses not to exclude all diseases for one time. And for excluding this, you need every day to do tests of blood, urine , and faeces on hide blood. And check fluorography. Women's are needing visiting gynaecologist, do are all needing smears and do mammography.

Such complex investigation will help to exclude serious pathologies and prescribe adequate cure.