See man hyperhidrosis can be because of reasons like.... Anxiety... Hyperthyroideism but you have already done a
thyroid function test which is normal according to you so it's not the cause.
Can also be because of hypoglycemia so you need to get your blood
sugar tested ..
HbA1C ..FBS..PPBS .
Can use Aldry lotion for local application at night and wash it away in the morning ... Don't apply near your eyes it will cause irritation
Drink plenty of water.
Don't take unnecessary stress.