Hi “swap” for short 
I researched a little bit about your condition to understand better before suggesting anything.
And this is what i found (maybe you know all the possibilities maybe you dont, but also others can read and suggest more things)
"Trichodynia is defined as a painful sensation in the skin of the scalp or the hair itself and becomes more intense when hairs are touched. Before making a diagnosis of “trichodynia,” the physician must be sure that there is no cutaneous disease. If the patient reports headache or temporal pain by palpation, tension headaches or temporal arteritis should be evaluated first. The term “trichodynia” (cutaneous dysesthesia syndrome) has also been proposed for discomfort, pain, burning, or stinging of the scalp related to diffuse alopecia
The underlying mechanisms creating the pain are not clear, though it has been proposed that it is probably multi-etiological. The most accepted hypotheses are increased expression of the neuropeptide substance P (SP), underlying psychiatric disorders, nutritional deficiencies, and perifollicular inflammation. Substance P is involved in pain perception by the nerve endings, and changes in the production and activity of substance P around the hair follicles may be responsible for the pain and burning sensation.
Hair follicles are innervated by unmyelinated neural plexuses located around the hair follicle stem cells. These nerve fibers contain neuropeptides including substance P (SP) and calcitonin gene-related peptide (CGRP). These neuropeptides play an important role in the regulation of hair growth and are associated with the neurogenic inflammatory response. Perifollicular SP is also involved in the regulation of hair growth
An imbalance in the tonic release of neuropeptides may result in inhibition of hair growth. hypothesized that chronic activation of the c-fibers, in addition to mediating inflammatory pain and follicular injury, might reduce SP and CGRP concentrations resulting in altered peribulbar antigen presentation and inhibition of further hair growth"
Another explanation is an underlying mental condition as Anxiety and Depression. (Not confirmed, studies vary)
And last possible explanation is Neuropathic pain can also be associated with nutritional deficiencies (Fe, B12, ferritin, zinc, vitamin D, vitamin E). Nutritional factors affect the hair directly, and dietary supplements containing B complex vitamins can influence hair growth.
(Extracted from www.intechopen.com)
So lets see, ill give you the start point, then you can read the description of the fields and the comments in their thread.
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That i can think of, it something else ill post after and some other members can help as well
And check into better the intake of the vitamins and minerals mentioned above as well
Also you can click on the magnifying glass and type “hair” and youll see many other posts from members asking for advice etc with different hair issues, so maybe you can find answers in them as well
