I am Dr. Arun and will be helping you today.
One of the common cause for face flushing is medications, herbs or supplements. So if you have starting anything new around two months, that need to be looked as the possible culprit. The other cause can be hormonal. Following investigations are needed to ascertain the cause;
1) Thyroid and adrenal function tests.
2) FSH, LH, Prolactin, estradiol and testosterone.
3) Complete blood counts.
4) Comprehensive metabolic panel.
5) Urinary 5-hydroxyindoleacetic acid (5-HIAA)
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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