What causes a red bump that keeps growing and is painful, itchy, and hard?
May 15, 2023
Source: Cainiu Health
Dr. Liu Wan
Introduction
Red bumps that are painful, itchy, and hard may be caused by insect bites, folliculitis, urticaria, etc. Specifically: if an individual is bitten by an insect, the venom introduced by the insect can irritate the skin, leading to red, painful, itchy, and firm bumps. Symptoms can be relieved under medical guidance using calamine lotion, sodium chloride and hydrochloride solution, etc.
In general, long-lasting red bumps that are painful, itchy, and hard may be caused by factors such as insect bites, folliculitis, or urticaria. A detailed analysis is as follows:
1. Insect bites
If a person is bitten by an insect, the venom carried by the insect may irritate the skin, leading to the formation of red bumps accompanied by pain, itching, and hardness. Symptoms can be relieved under medical guidance using calamine lotion or chlorpheniramine hydrochloride solution.
2. Folliculitis
Folliculitis is usually caused by bacterial infection or sebum accumulation, resulting in prolonged blockage of hair follicles. Under stimulation by inflammatory factors, the above symptoms commonly occur. Treatment may include topical application of mupirocin ointment or erythromycin ointment as directed by a physician.
3. Urticaria
Coxsackievirus infection, upper respiratory viral infections, and similar pathogens are major causes of urticaria. When the skin and mucous membranes are invaded by these pathogens, patients may develop such symptoms. Medications such as levocetirizine hydrochloride tablets or amoxicillin capsules may be used for treatment as prescribed by a doctor.
In addition, painful, itchy, and hard red bumps could also be due to eczema, erythema nodosum, allergic dermatitis, or other conditions. It is recommended to maintain a healthy lifestyle and regular作息 (daily routine) during treatment.
