What is the reason for the red neck

The neck is a very sensitive part of our body and is prone to disease. In daily life, many people will find that their necks are red. What is the reason for the red neck? Generally, the more common factor is allergic dermatitis. We can understand the symptoms of this disease and make a comprehensive judgment based on other physical symptoms. Now let’s take a look at the situation of allergic dermatitis.

Clinical manifestations

The manifestations of dermatitis are generally non-specific. Due to different contact objects, contact methods and individual reactions, the form, scope and severity of dermatitis are also different. In mild cases, local erythema appears, ranging from light red to bright red, with slight edema, or dense needle-sized papules. In severe cases, erythema and swelling are obvious, and there are many papules and blisters on this basis. Bullae may occur when the inflammation is severe. When blisters rupture, there will be erosion, exudation and crusting. If it is a severe primary irritation, it can cause epidermal necrosis and shedding, and even cause ulcers deep into the dermis. When dermatitis occurs in areas with loose tissue, such as eyelids, lips, foreskin, scrotum, etc., there will be obvious swelling, localized edema without clear edges, shiny skin, and disappearance of surface texture.

The location and range of dermatitis are consistent with the contact site of the contact object, and the boundaries are very clear. However, if the contact object is gas or dust, the dermatitis is diffuse without definite clear boundaries, but it mostly occurs in exposed parts of the body.

Most subjective symptoms include itching and burning or distending pain. In a few severe cases, there may be systemic reactions such as fever, chills, headache, nausea, etc.

The course of the disease is self-limited. Generally, after the cause is eliminated and treated properly, it can be cured in 1 to 2 weeks. Repeated contact or improper handling may turn into subacute or chronic dermatitis, presenting as reddish-brown lichenoid or eczematous changes.

Irritant contact dermatitis may manifest clinically as erythema, blisters, and exudation in the acute phase. Subacute and chronic cases may present with erythema, roughness, desquamation, and fissures. Depending on the nature of the contact irritant and the duration of contact, the clinical manifestations may include acute irritant dermatitis, delayed acute irritant dermatitis, irritant reaction, cumulative irritant dermatitis, pustular irritant dermatitis, mechanical stimulation-induced dermatitis, etc.