Telogen Effluvium and Scalp Pain
Yes, telogen effluvium can cause scalp pain and tenderness, a symptom known as trichodynia, which occurs in a significant proportion of patients with this condition.
Clinical Evidence for Scalp Pain in Telogen Effluvium
Trichodynia was originally coined in 1996 specifically to describe patients with diffuse alopecia consistent with telogen effluvium, establishing the direct association between this hair loss pattern and scalp discomfort 1, 2.
Telogen effluvium patients have a significantly higher prevalence of sensitive scalp symptoms compared to other forms of alopecia, including pain, burning sensation, pruritus, and trichodynia (p<0.001) 3.
In a study of 248 patients with hair loss, trichodynia was found in 29% overall, and was significantly more frequent in the telogen effluvium group than in the androgenetic alopecia group (p<0.0071) 4.
Telogen effluvium can present with symptoms such as trichodynia, which manifests as pain, discomfort, burning, or formication of the scalp 5.
Clinical Presentation
The scalp pain can occur throughout the entire scalp or be localized to specific areas, and almost always occurs in association with hair loss 1, 2.
A distinct subtype called "Telogen Effluvium with Dysesthesia (TED)" has been identified, characterized by severe itch, pain, soreness, burning, or formication in the absence of any inflammatory scalp disorder 6.
The scalp typically appears normal without inflammation or scaling on examination, which helps differentiate telogen effluvium from inflammatory conditions like tinea capitis or scarring alopecia 7.
Pathophysiology
Proposed mechanisms for trichodynia in telogen effluvium include substance P involvement, perifollicular inflammation, and psychiatric comorbidities 1, 2.
Patients with telogen effluvium and dysesthesia may have lower vitamin B12 levels and may respond to B12 supplementation, suggesting a nutritional component to the scalp symptoms 6.
Psychiatric Comorbidity
76% of patients with trichodynia have associated psychopathologic signs, including depression, obsessive-compulsive disorder, anxiety, and somatoform disorders, compared to only 20% in controls without hair loss (p=0.0004) 4.
Trichodynia has a higher prevalence among women and is associated with psychiatric comorbidities 1, 2.
Diagnostic Approach
Diagnosis of trichodynia is clinical and one of exclusion, requiring assessment of scalp symptoms alongside the characteristic diffuse shedding pattern of telogen effluvium 1, 2.
The hair pull test is positive in telogen effluvium (>6 hairs extracted from 40-60 hairs), confirming excessive telogen shedding 7.
Consider checking vitamin B12 levels in patients with telogen effluvium who report significant scalp dysesthesia, as this subtype may respond to supplementation 6.